Component: Button migration 1: TextButton (#7537)

## Summary

Setup the variants and migrate existing uses of
TextButton/TextIconButton/IconButton to a single Button component.

Still a work in progress.

## Changes

- **What**: Add a new Button
- **What**: Migrate old buttons
- **What**: Delete old buttons
- **Dependencies**: CVA, upgrade Storybook

## Review Focus

<!-- Critical design decisions or edge cases that need attention -->

<!-- If this PR fixes an issue, uncomment and update the line below -->
<!-- Fixes #ISSUE_NUMBER -->

## Screenshots (if applicable)

<!-- Add screenshots or video recording to help explain your changes -->

┆Issue is synchronized with this [Notion
page](https://www.notion.so/PR-7537-WIP-Component-Button-migration-2cb6d73d36508156a81bfc7bbddb36e9)
by [Unito](https://www.unito.io)

---------

Co-authored-by: GitHub Action <action@github.com>

pnpm-lock.yaml

@@ -138,6 +138,9 @@ catalogs:
     cross-env:
       specifier: ^10.1.0
       version: 10.1.0
+    cva:
+      specifier: 1.0.0-beta.4
+      version: 1.0.0-beta.4
     dotenv:
       specifier: ^16.4.5
       version: 16.6.1
@@ -419,6 +422,9 @@ importers:
       chart.js:
         specifier: ^4.5.0
         version: 4.5.0
+      cva:
+        specifier: 'catalog:'
+        version: 1.0.0-beta.4(typescript@5.9.2)
       dompurify:
         specifier: ^3.2.5
         version: 3.2.5
@@ -4669,6 +4675,14 @@ packages:
   csstype@3.2.3:
     resolution: {integrity: sha512-z1HGKcYy2xA8AGQfwrn0PAy+PB7X/GSj3UVJW9qKyn43xWa+gl5nXmU4qqLMRzWVLFC8KusUX8T/0kCiOYpAIQ==}
 
+  cva@1.0.0-beta.4:
+    resolution: {integrity: sha512-F/JS9hScapq4DBVQXcK85l9U91M6ePeXoBMSp7vypzShoefUBxjQTo3g3935PUHgQd+IW77DjbPRIxugy4/GCQ==}
+    peerDependencies:
+      typescript: '>= 4.5.5'
+    peerDependenciesMeta:
+      typescript:
+        optional: true
+
   data-urls@5.0.0:
     resolution: {integrity: sha512-ZYP5VBHshaDAiVZxjbRVcFJpc+4xGgT0bK3vzy1HLN8jTO975HEbuYzZJcHoQEY5K1a0z8YayJkyVETa08eNTg==}
     engines: {node: '>=18'}
@@ -12808,6 +12822,12 @@ snapshots:
 
   csstype@3.2.3: {}
 
+  cva@1.0.0-beta.4(typescript@5.9.2):
+    dependencies:
+      clsx: 2.1.1
+    optionalDependencies:
+      typescript: 5.9.2
+
   data-urls@5.0.0:
     dependencies:
       whatwg-mimetype: 4.0.0