Improve the bug report templates (#25621)

.github/ISSUE_TEMPLATE/2.server_bug_report.yml

@@ -0,0 +1,65 @@
+name: Bug Report (server / API)
+description: |
+  If something is not working as expected, but is not from using the web interface.
+labels: [bug, 'status/to triage']
+body:
+  - type: markdown
+    attributes:
+      value: |
+        Make sure that you are submitting a new bug that was not previously reported or already fixed.
+
+        Please use a concise and distinct title for the issue.
+  - type: textarea
+    attributes:
+      label: Steps to reproduce the problem
+      description: What were you trying to do?
+      value: |
+        1.
+        2.
+        3.
+        ...
+    validations:
+      required: true
+  - type: input
+    attributes:
+      label: Expected behaviour
+      description: What should have happened?
+    validations:
+      required: true
+  - type: input
+    attributes:
+      label: Actual behaviour
+      description: What happened?
+    validations:
+      required: true
+  - type: textarea
+    attributes:
+      label: Detailed description
+    validations:
+      required: false
+  - type: input
+    attributes:
+      label: Mastodon instance
+      description: The address of the Mastodon instance where you experienced the issue
+      placeholder: mastodon.social
+    validations:
+      required: false
+  - type: input
+    attributes:
+      label: Mastodon version
+      description: |
+        This is displayed at the bottom of the About page, eg. `v4.1.2+nightly-20230627`
+      placeholder: v4.1.2
+    validations:
+      required: false
+  - type: textarea
+    attributes:
+      label: Technical details
+      description: |
+        Any additional technical details you may have, like logs or error traces
+      value: |
+        If this is happening on your own Mastodon server, please fill out those:
+        - Ruby version: (from `ruby --version`, eg. v3.1.2)
+        - Node.js version: (from `node --version`, eg. v18.16.0)
+    validations:
+      required: false