feat(cli): ctx init — interactive setup wizard

TUI setup wizard: Config (URL + API Key), health check, version check
(GitHub releases), Claude Code hooks (SubagentStart/Stop), statusline.

Idempotent: re-run shows status per item, only changes what's missing.
Stdlib-only (no new dependencies), cross-platform (Linux/macOS/Windows),
NO_COLOR support. 15 unit tests.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: GottZ

go/cmd/ctx/main.go

@@ -22,6 +22,7 @@ func main() {
 		Long:  "ctx — The memory your LLM pretends to have. By GottZ.",
 	}
 
+	cli.Version = version
 	cli.RegisterCommands(root)
 
 	root.AddCommand(&cobra.Command{

go/internal/cli/commands.go

@@ -41,6 +41,7 @@ func RegisterCommands(root *cobra.Command) {
 	root.AddCommand(dreamCmd(getClient))
 	root.AddCommand(briefCmd(getClient))
 	root.AddCommand(persistCmd(getClient))
+	root.AddCommand(initCmd())
 }
 
 // ── query ────────────────────────────────────────────────────────────.