feat: cli migrate to cobra with subcommands (#550)

* feat: migrate CLI to cobra with dump/list/version subcommands (#546)
* fix: remove residual duckduckgo references and add README/LICENSE to release archives
* fix: address PR review feedback from Copilot

browser/firefox/firefox.go

@@ -47,6 +47,7 @@ func NewBrowsers(cfg types.BrowserConfig) ([]*Browser, error) {
 }
 
 func (b *Browser) BrowserName() string { return b.cfg.Name }
+func (b *Browser) ProfileDir() string  { return b.profileDir }
 func (b *Browser) ProfileName() string {
 	if b.profileDir == "" {
 		return ""