Sprint B.5: add-LICENSE action (MIT/Apache-2.0) in [m] menu + vulp repo license

- src/license/: embedded templates, holder resolution (config > git user.name
  > account username), write path shared by TUI and CLI
- TUI: bulk-aware [m] entry over action_targets(), kind select + confirm,
  point-updates has_license/is_dirty, logs to activity (new License kind)
- CLI: vulp repo license <repo>...|--all [--kind] [--holder] [--json],
  skips already-licensed repos, exit 2/4 contract kept
- config: license_holder + default_license fields (TUI-editable)
- never overwrites an existing license, never auto-commits

src/hub/modals_spawn.rs

@@ -609,6 +609,12 @@ pub fn open_action_menu(state: &mut HubState) {
         entries.push(entry("Delete project",         "Del",   kc(KeyCode::Delete)));
     }
 
+    // Bulk-aware (multi-select > cursor repo > project): only shown when at
+    // least one targeted repo is missing a license file.
+    if state.action_targets().iter().any(|&ri| !state.repos[ri].has_license) {
+        entries.push(entry("Add LICENSE (MIT/Apache)", "", MenuAction::AddLicense));
+    }
+
     match state.tab {
         Tab::Todos => {
             entries.push(entry("Cycle todo status",   "Space", kc(KeyCode::Char(' '))));