chore(gitignore): ignore build binaries and archive artifacts

Ignore compiled binaries and packaging archives that are generated
during a build, without hiding tracked build source files:

- build/bin: the compiled application binary
- *.tar / *.tar.gz: packaging archives (e.g. Wails .ptmp temp dirs)
- /AniTrack: the root app binary (fix the previous './AniTrack'
  pattern, which gitignore did not match)

.gitignore

@@ -35,5 +35,6 @@ environment.go
 http-client.private.env.json
 
 # Build artifacts
-build/*.tar.gz
-./AniTrack
+*.tar
+*.tar.gz
+/AniTrack