Refactor issue templates and routing configuration for improved autom…

.github/ISSUE_TEMPLATE/bug_report.yml

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+name: Bug report
+description: Something on the phpBB.com websites is broken or wrong
+labels: [bug]
+type: Bug
+body:
+  - type: markdown
+    attributes:
+      value: |
+        Thanks for reporting! This tracker is for the phpBB.com websites only. Bugs in the phpBB
+        software go to [tracker.phpbb.com](https://tracker.phpbb.com/browse/PHPBB3), and security
+        problems must be [reported privately](https://github.com/phpbb/website_issues/security).
+  - type: dropdown
+    id: area
+    attributes:
+      label: Which site or area is affected?
+      options:
+        - www.phpbb.com
+        - area51.phpbb.com
+        - blog.phpbb.com
+        - tracker.phpbb.com (the tracker itself, not phpBB bugs)
+        - Downloads
+        - Sign-in / account
+        - Something else / not sure
+    validations:
+      required: true
+  - type: input
+    id: url
+    attributes:
+      label: Page URL
+      description: The address of the page where you saw the problem, if there is one.
+      placeholder: https://www.phpbb.com/...
+  - type: textarea
+    id: description
+    attributes:
+      label: Describe the bug
+      description: A clear and concise description of what the bug is.
+    validations:
+      required: true
+  - type: textarea
+    id: reproduce
+    attributes:
+      label: To reproduce
+      description: Steps to reproduce the behaviour.
+      placeholder: |
+        1. Go to '...'
+        2. Click on '...'
+        3. See error
+  - type: textarea
+    id: expected
+    attributes:
+      label: Expected behaviour
+      description: What you expected to happen instead.
+  - type: textarea
+    id: context
+    attributes:
+      label: Screenshots and additional context
+      description: Screenshots, browser and operating system, or anything else that helps.

.github/ISSUE_TEMPLATE/feature_request.yml

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+name: Feature request
+description: Suggest an idea or improvement for the phpBB.com websites
+labels: [enhancement]
+type: Feature
+body:
+  - type: dropdown
+    id: area
+    attributes:
+      label: Which site or area is affected?
+      options:
+        - www.phpbb.com
+        - area51.phpbb.com
+        - blog.phpbb.com
+        - tracker.phpbb.com (the tracker itself, not phpBB bugs)
+        - Downloads
+        - Sign-in / account
+        - Something else / not sure
+    validations:
+      required: true
+  - type: textarea
+    id: problem
+    attributes:
+      label: Is your feature request related to a problem?
+      description: A clear and concise description of what the problem is. Ex. I'm always frustrated when [...]
+  - type: textarea
+    id: solution
+    attributes:
+      label: Describe the solution you'd like
+      description: A clear and concise description of what you want to happen.
+    validations:
+      required: true
+  - type: textarea
+    id: alternatives
+    attributes:
+      label: Describe alternatives you've considered
+      description: Any alternative solutions or features you've considered.
+  - type: textarea
+    id: context
+    attributes:
+      label: Additional context
+      description: Any other context or screenshots about the feature request.

.github/issue-routing.yml

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+# Issue routing: which labels an issue gets and who is assigned to it.
+#
+# This is the only place sites, labels and teams are defined. The "area" dropdown in
+# the issue forms (.github/ISSUE_TEMPLATE/*.yml) is generated from this file
+# automatically when it changes, so never edit those options by hand.
+#
+# How it works:
+#   1. Each entry under `labels` is a label. If it has an `area`, that text is an option
+#      in the issue form's dropdown, and picking it adds the label to a new issue.
+#   2. For every label on an issue, the members of its `teams` (and any extra `users`)
+#      are assigned. Adding one of these labels later assigns that label's team too.
+#   3. An issue always ends up with at least one label and one assignee: if it has
+#      none, the label marked `fallback: true` and its team are used. The fallback
+#      label is removed again once another routed label is added.
+#
+# Keys per label:
+#   area         Text shown in the form dropdown (optional; leave out for labels that
+#                are only added by hand). Dropdown order follows this file.
+#   teams        Team slugs in the phpbb organisation: development-team, extensions-team,
+#                management, styles-team, support-team, website-team.
+#   users        Extra GitHub usernames to assign (optional).
+#   color        Label colour, used when the label is created. Quote it.
+#   description  Label description, used when the label is created.
+#   fallback     true on exactly one label: used for issues nobody else picked up.
+
+# The dropdown heading in the issue forms.
+area_field: Which site or area is affected?
+
+labels:
+  "site: www":
+    area: www.phpbb.com
+    color: "1d76db"
+    description: www.phpbb.com
+    teams: [website-team]
+  "site: area51":
+    area: area51.phpbb.com
+    color: "5319e7"
+    description: area51.phpbb.com
+    teams: [website-team, development-team]
+  "site: blog":
+    area: blog.phpbb.com
+    color: "c5def5"
+    description: blog.phpbb.com
+    teams: [website-team]
+  "site: tracker":
+    area: tracker.phpbb.com (the tracker itself, not phpBB bugs)
+    color: "bfd4f2"
+    description: tracker.phpbb.com
+    teams: [website-team, development-team]
+  downloads:
+    area: Downloads
+    color: "0e8a16"
+    description: Downloads and the download pages
+    teams: [website-team]
+  accounts:
+    area: Sign-in / account
+    color: "fbca04"
+    description: Sign-in, registration and accounts
+    teams: [website-team]
+  needs triage:
+    area: Something else / not sure
+    fallback: true
+    color: "d4c5f9"
+    description: Needs to be looked at and routed
+    teams: [website-team]