Add directory skeleton and CLI entry point with Cobra

- Create internal/{app,config,engine,divert,socks5,bypass,checker,service,tray,procscan,updater} with placeholder doc.go per package.
- Add .gitkeep stubs for internal/frontend, third_party/{windivert,icons}, installer/, .forgejo/workflows/, docs/.
- Implement cmd/drover/main.go: Cobra root with Version/Commit/BuildDate ldflags, --config global flag, and stub subcommands (check, update --check-only, service install/uninstall/start/stop).
- Add github.com/spf13/cobra v1.10.2 dependency.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

cmd/drover/main.go

@@ -0,0 +1,93 @@
+// Command drover is the entry point for the Discord proxy CLI.
+package main
+
+import (
+	"fmt"
+	"os"
+
+	"github.com/spf13/cobra"
+)
+
+// Build-time variables, populated via -ldflags "-X main.Version=... -X main.Commit=... -X main.BuildDate=...".
+var (
+	Version   = "dev"
+	Commit    = "dev"
+	BuildDate = "dev"
+)
+
+// configPath is the path to the TOML config file, set via the --config global flag.
+// Reserved for use in later phases.
+var configPath string
+
+func main() {
+	if err := newRootCmd().Execute(); err != nil {
+		// Cobra already prints the error; just exit non-zero.
+		os.Exit(1)
+	}
+}
+
+func newRootCmd() *cobra.Command {
+	root := &cobra.Command{
+		Use:           "drover",
+		Short:         "Discord proxy via SOCKS5 + WinDivert",
+		Version:       fmt.Sprintf("%s (commit %s, built %s)", Version, Commit, BuildDate),
+		SilenceUsage:  true,
+		SilenceErrors: false,
+	}
+
+	// Custom version template: "drover-go vX.Y.Z (commit abc1234, built 2026-05-01)".
+	root.SetVersionTemplate(fmt.Sprintf("drover-go v%s (commit %s, built %s)\n", Version, Commit, BuildDate))
+
+	root.PersistentFlags().StringVar(&configPath, "config", "", "path to TOML config file (reserved)")
+
+	root.AddCommand(newCheckCmd())
+	root.AddCommand(newUpdateCmd())
+	root.AddCommand(newServiceCmd())
+
+	return root
+}
+
+func newCheckCmd() *cobra.Command {
+	return &cobra.Command{
+		Use:   "check",
+		Short: "Run the 7-step proxy diagnostic",
+		RunE: func(cmd *cobra.Command, args []string) error {
+			fmt.Fprintln(cmd.OutOrStdout(), "TODO: 7-step diagnostic")
+			return nil
+		},
+	}
+}
+
+func newUpdateCmd() *cobra.Command {
+	var checkOnly bool
+	cmd := &cobra.Command{
+		Use:   "update",
+		Short: "Self-update via the Forgejo Releases API",
+		RunE: func(cmd *cobra.Command, args []string) error {
+			fmt.Fprintln(cmd.OutOrStdout(), "TODO: update check")
+			_ = checkOnly // wired up for the upcoming implementation
+			return nil
+		},
+	}
+	cmd.Flags().BoolVar(&checkOnly, "check-only", false, "only check for an update, do not apply")
+	return cmd
+}
+
+func newServiceCmd() *cobra.Command {
+	cmd := &cobra.Command{
+		Use:   "service",
+		Short: "Manage the drover Windows service",
+	}
+	for _, name := range []string{"install", "uninstall", "start", "stop"} {
+		name := name
+		cmd.AddCommand(&cobra.Command{
+			Use:   name,
+			Short: fmt.Sprintf("%s the drover Windows service", name),
+			RunE: func(cmd *cobra.Command, args []string) error {
+				fmt.Fprintf(cmd.OutOrStdout(), "TODO: service %s\n", name)
+				return nil
+			},
+		})
+	}
+	return cmd
+}