Add new commands, skills, and agents; remove token loading script

- Add groom, plan-issues, and roadmap commands
- Add skills for backlog-grooming, forgejo, issue-writing, roadmap-planning
- Add agents directory structure
- Remove load-forgejo-token.sh and SessionStart hook (using fj auth instead)

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

skills/issue-writing/SKILL.md

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+# Issue Writing
+
+How to write clear, actionable issues.
+
+## Issue Structure
+
+### Title
+- Start with action verb: "Add", "Fix", "Update", "Remove", "Refactor"
+- Be specific: "Add user authentication" not "Auth stuff"
+- Keep under 60 characters when possible
+
+### Description
+
+```markdown
+## Summary
+One paragraph explaining what and why.
+
+## Acceptance Criteria
+- [ ] Specific, testable requirement
+- [ ] Another requirement
+- [ ] User can verify this works
+
+## Context
+Additional background, links, or references.
+
+## Technical Notes (optional)
+Implementation hints or constraints.
+```
+
+## Writing Acceptance Criteria
+
+Good criteria are:
+- **Specific**: "User sees error message" not "Handle errors"
+- **Testable**: Can verify pass/fail
+- **User-focused**: What the user experiences
+- **Independent**: Each stands alone
+
+Examples:
+```markdown
+- [ ] Login form validates email format before submission
+- [ ] Invalid credentials show "Invalid email or password" message
+- [ ] Successful login redirects to dashboard
+- [ ] Session persists across browser refresh
+```
+
+## Issue Types
+
+### Bug Report
+```markdown
+## Summary
+Description of the bug.
+
+## Steps to Reproduce
+1. Go to...
+2. Click...
+3. Observe...
+
+## Expected Behavior
+What should happen.
+
+## Actual Behavior
+What happens instead.
+
+## Environment
+- Browser/OS/Version
+```
+
+### Feature Request
+```markdown
+## Summary
+What feature and why it's valuable.
+
+## Acceptance Criteria
+- [ ] ...
+
+## User Story (optional)
+As a [role], I want [capability] so that [benefit].
+```
+
+### Technical Task
+```markdown
+## Summary
+What technical work needs to be done.
+
+## Scope
+- Include: ...
+- Exclude: ...
+
+## Acceptance Criteria
+- [ ] ...
+```
+
+## Labels
+
+Use labels to categorize:
+- `bug`, `feature`, `enhancement`, `refactor`
+- `priority/high`, `priority/low`
+- Component labels specific to project
+
+## Dependencies
+
+Reference related issues:
+- "Depends on #N" - Must complete first
+- "Blocks #N" - This blocks another
+- "Related to #N" - Informational link