feat: subcomando project en CLI con busqueda y listado integrado

Añade cmd/fn/project.go con subcomandos init, list, show y status
para gestionar proyectos desde la CLI. Integra projects en fn search,
fn list y fn show para que aparezcan junto a functions, types y apps.
También añade soporte para vaults en fn show y template project en
fn add -k project.

cmd/fn/main.go

@@ -37,6 +37,8 @@ func main() {
 		cmdRun(os.Args[2:])
 	case "check":
 		cmdCheck(os.Args[2:])
+	case "project":
+		cmdProject(os.Args[2:])
 	case "app":
 		cmdApp(os.Args[2:])
 	case "analysis":
@@ -63,6 +65,7 @@ Usage:
   fn check  params                          Lista funciones sin params_schema
   fn ops    <subcommand>                   Gestiona operations.db (fn ops help)
   fn proposal <add|list|show|update>       Gestiona proposals
+  fn project <init|list|show|status>       Gestiona proyectos
   fn app     <list|clone|pull>             Gestiona apps externas (Gitea)
   fn analysis <list|clone|pull>            Gestiona analyses externas (Gitea)`)
 }
@@ -126,7 +129,8 @@ func cmdIndex() {
 		}
 	}
 
-	fmt.Printf("Indexed %d functions, %d types, %d apps, %d analysis, %d unit_tests\n", result.Functions, result.Types, result.Apps, result.Analysis, result.UnitTests)
+	fmt.Printf("Indexed %d functions, %d types, %d apps, %d analysis, %d projects, %d vaults, %d unit_tests\n",
+		result.Functions, result.Types, result.Apps, result.Analysis, result.Projects, result.Vaults, result.UnitTests)
 	for _, e := range result.ValidationErrors {
 		fmt.Fprintf(os.Stderr, "  INVALID: %s\n", e)
 	}
@@ -190,7 +194,13 @@ func cmdSearch(args []string) {
 		os.Exit(1)
 	}
 
-	if len(fns) == 0 && len(types) == 0 && len(apps) == 0 && len(analyses) == 0 {
+	projects, err := db.SearchProjects(query)
+	if err != nil {
+		fmt.Fprintf(os.Stderr, "error: %v\n", err)
+		os.Exit(1)
+	}
+
+	if len(fns) == 0 && len(types) == 0 && len(apps) == 0 && len(analyses) == 0 && len(projects) == 0 {
 		fmt.Println("No results.")
 		return
 	}
@@ -233,6 +243,16 @@ func cmdSearch(args []string) {
 			fmt.Fprintf(w, "analysis\t%s\t%s\t%s\n", a.ID, a.Lang, desc)
 		}
 	}
+	if len(projects) > 0 {
+		if len(fns) > 0 || len(types) > 0 || len(apps) > 0 || len(analyses) > 0 {
+			fmt.Fprintln(w)
+		}
+		fmt.Fprintln(w, "PROJECT\tID\tDESCRIPTION")
+		for _, p := range projects {
+			desc := truncate(p.Description, 60)
+			fmt.Fprintf(w, "project\t%s\t%s\n", p.ID, desc)
+		}
+	}
 	w.Flush()
 }
 
@@ -317,7 +337,22 @@ func cmdList(args []string) {
 			fmt.Fprintf(w, "analysis\t%s\t%s\t%s\n", a.ID, a.Lang, a.Domain)
 		}
 	}
-	if len(fns) == 0 && len(types) == 0 && len(apps) == 0 && len(analyses) == 0 {
+	projects, err := db.ListAllProjects()
+	if err != nil {
+		fmt.Fprintf(os.Stderr, "error: %v\n", err)
+		os.Exit(1)
+	}
+
+	if len(projects) > 0 {
+		if len(fns) > 0 || len(types) > 0 || len(apps) > 0 || len(analyses) > 0 {
+			fmt.Fprintln(w)
+		}
+		fmt.Fprintln(w, "PROJECT\tID\tDESCRIPTION")
+		for _, p := range projects {
+			fmt.Fprintf(w, "project\t%s\t%s\n", p.ID, truncate(p.Description, 60))
+		}
+	}
+	if len(fns) == 0 && len(types) == 0 && len(apps) == 0 && len(analyses) == 0 && len(projects) == 0 {
 		fmt.Println("Registry is empty. Run 'fn index' first.")
 	}
 	w.Flush()
@@ -359,6 +394,18 @@ func cmdShow(args []string) {
 		return
 	}
 
+	p, errP := db.GetProject(id)
+	if errP == nil {
+		printProjectEntry(p)
+		return
+	}
+
+	v, errV := db.GetVault(id)
+	if errV == nil {
+		printVaultEntry(v)
+		return
+	}
+
 	fmt.Fprintf(os.Stderr, "not found: %s\n", id)
 	os.Exit(1)
 }
@@ -518,6 +565,37 @@ func printAnalysisEntry(a *registry.Analysis) {
 	}
 }
 
+func printProjectEntry(p *registry.Project) {
+	fmt.Printf("ID:          %s\n", p.ID)
+	fmt.Printf("Name:        %s\n", p.Name)
+	fmt.Printf("Description: %s\n", p.Description)
+	fmt.Printf("Tags:        %s\n", strings.Join(p.Tags, ", "))
+	fmt.Printf("Dir:         %s\n", p.DirPath)
+	if p.RepoURL != "" {
+		fmt.Printf("Repo URL:    %s\n", p.RepoURL)
+	}
+	if p.Notes != "" {
+		fmt.Printf("\nNotes:\n%s\n", p.Notes)
+	}
+	if p.Documentation != "" {
+		fmt.Printf("\nDocumentation:\n%s\n", p.Documentation)
+	}
+}
+
+func printVaultEntry(v *registry.Vault) {
+	fmt.Printf("ID:          %s\n", v.ID)
+	fmt.Printf("Name:        %s\n", v.Name)
+	if v.ProjectID != "" {
+		fmt.Printf("Project:     %s\n", v.ProjectID)
+	}
+	fmt.Printf("Description: %s\n", v.Description)
+	if v.Path != "" {
+		fmt.Printf("Path:        %s\n", v.Path)
+	}
+	fmt.Printf("Symlink:     %v\n", v.Symlink)
+	fmt.Printf("Tags:        %s\n", strings.Join(v.Tags, ", "))
+}
+
 // --- check ---
 
 func cmdCheck(args []string) {
@@ -594,8 +672,10 @@ func cmdAdd(args []string) {
 		templatePath = filepath.Join(r, "docs", "templates", "app.md")
 	case "analysis":
 		templatePath = filepath.Join(r, "docs", "templates", "analysis.md")
+	case "project":
+		templatePath = filepath.Join(r, "docs", "templates", "project.md")
 	default:
-		fmt.Fprintf(os.Stderr, "unknown kind: %s (use function, pipeline, component, app, or analysis)\n", kind)
+		fmt.Fprintf(os.Stderr, "unknown kind: %s (use function, pipeline, component, app, analysis, or project)\n", kind)
 		os.Exit(1)
 	}