Initial implementation of Gitea Wrapped TUI

- Gitea API client with repository and commit fetching
- Interactive credential input screen with masked token input
- Statistics analyzer for commits, languages, and activity patterns
- Multi-page report screen with ASCII charts and visualizations
- Integration of all components in main app coordinator
- Comprehensive README with usage instructions

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

cmd/gitea-wrapped/main.go

@@ -0,0 +1,19 @@
+package main
+
+import (
+	"fmt"
+	"os"
+
+	tea "github.com/charmbracelet/bubbletea"
+
+	"github.com/atridad/gitea-wrapped/pkg/ui"
+)
+
+func main() {
+	app := ui.NewApp()
+	p := tea.NewProgram(app)
+	if _, err := p.Run(); err != nil {
+		fmt.Fprintf(os.Stderr, "Error: %v\n", err)
+		os.Exit(1)
+	}
+}