[CL-652] Remove bootstrap and enable tailwind preflight (#8071)

Wraps up the tailwind migration by removing bootstrap from the web vault.

apps/browser/src/platform/popup/layout/popup-layout.stories.ts

@@ -117,7 +117,7 @@ class MockPopoutButtonComponent {}
 @Component({
   selector: "mock-current-account",
   template: `
-    <button class="tw-bg-transparent tw-border-none tw-p-0 tw-me-1" type="button">
+    <button class="tw-bg-transparent tw-border-none tw-p-0 tw-me-1 tw-align-middle" type="button">
       <bit-avatar text="Ash Ketchum" size="small"></bit-avatar>
     </button>
   `,

apps/browser/src/popup/scss/tailwind.css

@@ -1,9 +1,5 @@
 @import "../../../../../libs/components/src/tw-theme.css";
 
-@tailwind base;
-@tailwind components;
-@tailwind utilities;
-
 @layer components {
   /** Safari Support */
   html.browser_safari .tw-styled-scrollbar::-webkit-scrollbar {