chore: migrate Button to @revoltchat/ui (#617)

* chore: start moving Button over

* fix: convert ServerIdentityModal

* fix: modal button styling

* fix: popover styles

* fix: clean up references to ui/*.*

* fix: button sizing

Co-authored-by: Ed L <beartechtalks@gmail.com>

vite.config.ts

@@ -119,7 +119,6 @@ export default defineConfig({
         rollupOptions: {
             input: {
                 main: resolve(__dirname, "index.html"),
-                ui: resolve(__dirname, "ui/index.html"),
             },
         },
     },