chore: initialize beads project tracking

Add .beads/ directory for dependency-aware issue tracking with the
beads (br) CLI. This provides lightweight task management for the
AMC project.

Files:
- config.yaml: Project configuration (prefix, priorities, types)
- issues.jsonl: Issue database in append-only JSONL format
- metadata.json: Project metadata and statistics
- .gitignore: Ignore database files, locks, and temporaries

Current issues track slash-command autocomplete feature planning
(fetchSkills API, SlashMenu component, hook integration, etc.)

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

.beads/.gitignore

@@ -0,0 +1,11 @@
+# Database
+*.db
+*.db-shm
+*.db-wal
+
+# Lock files
+*.lock
+
+# Temporary
+last-touched
+*.tmp