Add missing main entry point and fix gitignore

Author: valerius21

.gitignore

@@ -30,7 +30,7 @@ go.work.sum
 # Editor/IDE
 # .idea/
 # .vscode/
-repokill
+/repokill
 .devenv/
 
 # Devenv

cmd/repokill/main.go

@@ -0,0 +1,71 @@
+package main
+
+import (
+	"context"
+	"flag"
+	"fmt"
+	"os"
+
+	tea "github.com/charmbracelet/bubbletea"
+	"github.com/valerius21/repokill/internal/filter"
+	"github.com/valerius21/repokill/internal/github"
+	"github.com/valerius21/repokill/internal/tui"
+)
+
+// Version is set at build time via ldflags.
+var Version = "dev"
+
+func main() {
+	org := flag.String("org", "", "List repos for an organization")
+	public := flag.Bool("public", false, "Show only public repos")
+	private := flag.Bool("private", false, "Show only private repos")
+	archived := flag.Bool("archived", false, "Show only archived repos")
+	forked := flag.Bool("forked", false, "Show only forks")
+	version := flag.Bool("version", false, "Show version")
+	flag.Parse()
+
+	if *version {
+		fmt.Printf("repokill %s\n", Version)
+		os.Exit(0)
+	}
+
+	// Build filter options
+	var filterOpts filter.FilterOptions
+	if *public {
+		filterOpts.Visibility = "public"
+	} else if *private {
+		filterOpts.Visibility = "private"
+	}
+	if *archived {
+		trueVal := true
+		filterOpts.Archived = &trueVal
+	}
+	if *forked {
+		trueVal := true
+		filterOpts.Forked = &trueVal
+	}
+
+	// Default sort: by pushedAt ascending (oldest first)
+	sortOpts := filter.SortOptions{
+		Field: filter.SortByPushedAt,
+		Order: filter.Ascending,
+	}
+
+	// Create GitHub client
+	client := github.NewClient(*org, nil)
+
+	// Check authentication
+	if err := client.CheckAuth(context.Background()); err != nil {
+		fmt.Fprintf(os.Stderr, "Error: %v\n", err)
+		os.Exit(1)
+	}
+
+	// Run TUI
+	model := tui.New(client, filterOpts, sortOpts)
+	p := tea.NewProgram(model, tea.WithAltScreen())
+
+	if _, err := p.Run(); err != nil {
+		fmt.Fprintf(os.Stderr, "Error running TUI: %v\n", err)
+		os.Exit(1)
+	}
+}