docs: add v0.3.0 release notes

chore: release version bump to 0.3.0

Merge pull request #3 from Glsme/feature-character-deco

docs: document custom agent color sync and persistence

Refactor color helper sharing and extract Office selected panel

Add agent custom color persistence and office color picker

Sync custom agent colors between Office and Dashboard

chore: bump version to 0.2.0

Merge pull request #2 from sky417/port-windows

refactor: extract duplicated Windows daemon script to single source of truth

fix: revert macOS daemon in cli.js to original ls -A check

chore: remove auto-generated Tauri schemas from tracking

test: add test coverage for Windows port

fix: address code review findings for Windows port

feat: port Agent Monitor to Windows