Rename to claudify, add docs and .deb packaging

- Rename package from claude-app to claudify (v0.1.0)
- Add README.md with install/usage instructions
- Add CLAUDE.md with architecture, build, and known issues
- Add .desktop file for application menu integration
- Build target set to .deb only
- Remove failed CSD button workarounds, document upstream bug
- Remove gtk dependency (no longer needed)

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src-tauri/Cargo.toml

@@ -1,7 +1,7 @@
 [package]
-name = "claude-app"
-version = "1.0.0"
-description = "Claude desktop app"
+name = "claudify"
+version = "0.1.0"
+description = "Native desktop wrapper for claude.ai"
 edition = "2021"
 
 [build-dependencies]
@@ -15,9 +15,6 @@ serde = { version = "1", features = ["derive"] }
 serde_json = "1"
 url = "2"
 
-[target.'cfg(target_os = "linux")'.dependencies]
-gtk = { version = "0.18", features = ["v3_24"] }
-
 [features]
 default = ["custom-protocol"]
 custom-protocol = ["tauri/custom-protocol"]