feat(cli): add CLI application with automatic command generation from swagger

Add a new CLI application (`cmd/cli/`) that generates command-line interface commands from the API swagger specification. Includes:
- Main CLI entry point with command parsing and execution
- Code generator that reads swagger.json and generates typed command handlers
- Makefile targets (`gen-cli`, `build-cli`) for generating and building the CLI
- GitHub Actions workflow to build cross-platform CLI binaries (linux/amd64, linux/arm64)

cmd/cli/types.go

@@ -0,0 +1,19 @@
+package main
+
+type Param struct {
+	FlagName    string
+	Name        string
+	In          string
+	Type        string
+	Required    bool
+	Description string
+}
+
+type Endpoint struct {
+	CommandPath []string
+	Method      string
+	Path        string
+	Summary     string
+	IsWebSocket bool
+	Params      []Param
+}