fix: chore: consolidate issue templates into .forgejo/ISSUE_TEMPLATE/ — currently orphaned in .codeberg/, not read by Forgejo (#626)

.codeberg/ISSUE_TEMPLATE/bug.yaml

@@ -1,49 +0,0 @@
-name: Bug Report
-about: Something is broken or behaving incorrectly
-labels:
-  - bug
-body:
-  - type: textarea
-    id: what
-    attributes:
-      label: What's broken
-      description: What happens vs what should happen. Include error messages, logs, or screenshots.
-    validations:
-      required: true
-  - type: textarea
-    id: reproduce
-    attributes:
-      label: Steps to reproduce
-      description: Minimal steps to trigger the bug.
-      placeholder: |
-        1. Run `dev-poll.sh disinto.toml`
-        2. See error: "..."
-    validations:
-      required: true
-  - type: textarea
-    id: affected-files
-    attributes:
-      label: Affected files
-      description: Which source files need to change? Include test files that cover this area.
-      placeholder: |
-        - dev/dev-agent.sh
-        - lib/agent-session.sh
-    validations:
-      required: true
-  - type: textarea
-    id: acceptance
-    attributes:
-      label: Acceptance criteria
-      description: How do we know it's fixed?
-      placeholder: |
-        - [ ] Bug no longer reproduces with steps above
-        - [ ] Regression test added
-        - [ ] CI green
-    validations:
-      required: true
-  - type: textarea
-    id: deps
-    attributes:
-      label: Dependencies
-      description: Issues that must be merged first. Leave empty if none.
-      placeholder: "- #NNN (reason)"