Initial commit: gtea CLI tool

Go CLI that wraps the Gitea API and git to create repos, commit,
push, and pull without leaving the terminal.

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

.gitignore

@@ -0,0 +1,17 @@
+# Binary
+gtea.exe
+*.exe
+
+# Go build artifacts
+*.o
+*.a
+
+# Go module cache
+vendor/
+
+# IDE
+.vscode/
+.idea/
+
+# Claude Code local settings
+.claude/settings.local.json