Add Edit Profile feature to Profile Modal

- Added "Edit Profile" button to active profile card in profile modal
- Created `profilePaneEdit` with form fields for profile metadata (Kind 0)
- Implemented `populateEditPane`, `handleEditProfile`, `handleSaveProfile` in `ProfileModalController`
- Added file upload support for profile/banner images using `r2Service`
- Injected `r2Service` into `ProfileModalController` via `ApplicationBootstrap`
- Verified functionality with manual check of logic and structure

js/ui/applicationBootstrap.js

@@ -432,6 +432,7 @@ export default class ApplicationBootstrap {
           nostrClient,
           nostrService: app.nostrService,
           storageService,
+          r2Service: app.r2Service,
           subscriptions,
           accessControl,
           moderation: moderationService,