feat(office): add Workspace TUI with shared bootstrap and test suite

Introduce the office Bubble Tea browser (module tree, multi-select lists,
markdown preview) alongside oo, with cmd/internal/bootstrap for shared auth,
unit tests across preview/model/ui/fetch, CI build for both binaries, and
GoReleaser archives for office.

Co-authored-by: Cursor <cursoragent@cursor.com>

cmd/oo/common.go

@@ -9,7 +9,7 @@ import (
 	"text/tabwriter"
 
 	onlyoffice "github.com/eslider/go-onlyoffice"
-	"github.com/joho/godotenv"
+	"github.com/eslider/go-onlyoffice/cmd/internal/bootstrap"
 	"github.com/spf13/cobra"
 )
 
@@ -36,37 +36,7 @@ func execute() error { return rootCmd.Execute() }
 // newOO loads env (only .env in CWD) and returns an authenticated client.
 // godotenv is a CLI-only concern; the library itself never loads dotfiles.
 func newOO(cmd *cobra.Command) (*onlyoffice.Client, error) {
-	loadOOEnv()
-	creds := onlyoffice.GetEnvironmentCredentials()
-	if creds.Url == "" || creds.User == "" || creds.Password == "" {
-		return nil, fmt.Errorf("need ONLYOFFICE_URL (or ONLYOFFICE_HOST/OO_URL), user (ONLYOFFICE_USER or ONLYOFFICE_NAME/OO_USER), password (ONLYOFFICE_PASS or ONLYOFFICE_PASSWORD/OO_PASS)")
-	}
-	c := onlyoffice.NewClient(creds)
-	c.SetDefaults(onlyoffice.GetEnvironmentDefaults())
-	if err := c.AuthenticateContext(cmd.Context()); err != nil {
-		return nil, err
-	}
-	return c, nil
-}
-
-func loadOOEnv() {
-	_ = godotenv.Load(".env")
-	applyOOEnvAliases()
-}
-
-func applyOOEnvAliases() {
-	setEnvIfEmpty("ONLYOFFICE_URL", "OO_URL")
-	setEnvIfEmpty("ONLYOFFICE_USER", "OO_USER")
-	setEnvIfEmpty("ONLYOFFICE_PASS", "OO_PASS")
-}
-
-func setEnvIfEmpty(dst, src string) {
-	if strings.TrimSpace(os.Getenv(dst)) != "" {
-		return
-	}
-	if v := strings.TrimSpace(os.Getenv(src)); v != "" {
-		_ = os.Setenv(dst, v)
-	}
+	return bootstrap.NewClient(cmd.Context())
 }
 
 // printJSON dumps any value as indented JSON.