docs: add ISSUE_TEMPLATE

.github/ISSUE_TEMPLATE/bug.yml

@@ -0,0 +1,16 @@
+name: Bug report
+description: File a bug report
+title: "issue: "
+type: Bug
+body:
+  - type: markdown
+    attributes:
+      value: |
+        Thanks for taking the time to fill out this bug report!
+  - type: textarea
+    id: what-happened
+    attributes:
+      label: What happened?
+      description: What did you expect to happen?
+    validations:
+      required: true

.github/ISSUE_TEMPLATE/config.yml

@@ -0,0 +1,10 @@
+contact_links:
+  - name: Developer Stoat Server
+    url: https://stt.gg/API
+    about: Ask questions and discuss with others.
+  - name: Stoat Support
+    url: https://support.stoat.chat/
+    about: See official resources for help with using Revolt or contacting the team.
+  - name: Discussions
+    url: https://github.com/orgs/stoatchat/discussions
+    about: For larger feature requests and general question & answer.