feat: update CreateChatButton text and variant for BUS-1677

- Change button text from 'Start chat' to 'Edit with AI'
- Change button variant from 'black' to 'default'
- Update tooltip title to match new button text

Co-Authored-By: nate@buster.so <nate@buster.so>

apps/web/src/components/features/AssetLayout/CreateChatButton.tsx

@@ -16,15 +16,15 @@ export const CreateChatButton = React.memo(
     useHotkeys('e', onCreateFileClick, { preventDefault: true });
 
     return (
-      <AppTooltip title={'Start chat'} shortcuts={['e']} delayDuration={650}>
+      <AppTooltip title={'Edit with AI'} shortcuts={['e']} delayDuration={650}>
         <Button
           loading={loading}
           onClick={onCreateFileClick}
-          variant="black"
+          variant="default"
           className="ml-1.5"
           prefix={<Stars />}
         >
-          Start chat
+          Edit with AI
         </Button>
       </AppTooltip>
     );