refactor: centralize path handling with XDG Base Directory compliance

- Add src/paths.rs module for all XDG path lookups
- Move scripts from ~/.config to ~/.local/share (XDG data)
- Use $XDG_CONFIG_HOME for browser bookmark paths
- Add dev-logging feature flag for verbose debug output
- Add dev-install profile for testable release builds
- Remove CLAUDE.md from version control

BREAKING: Scripts directory moved from
~/.config/owlry/scripts/ to ~/.local/share/owlry/scripts/

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

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

CLAUDE.md

@@ -1,32 +0,0 @@
-# Owlry - Claude Code Instructions
-
-## Release Workflow
-
-Always use `just` for releases and AUR deployment:
-
-```bash
-# Bump version (updates Cargo.toml + Cargo.lock, commits)
-just bump 0.x.y
-
-# Push and create tag
-git push && just tag
-
-# Update AUR package
-just aur-update
-
-# Review changes, then publish
-just aur-publish
-```
-
-Do NOT manually edit Cargo.toml for version bumps - use `just bump`.
-
-## Available just recipes
-
-- `just build` / `just release` - Build debug/release
-- `just check` - Run cargo check + clippy
-- `just test` - Run tests
-- `just bump <version>` - Bump version
-- `just tag` - Create and push git tag
-- `just aur-update` - Update PKGBUILD checksums
-- `just aur-publish` - Commit and push to AUR
-- `just aur-test` - Test PKGBUILD locally