feat: themes (#902)

* chore: add next theme and initial setup

* chore: add dark mode colors to layouts

* chore: user general setting page theming

* chore: dashboard theming

* chore: project page theming

* chore: workspace setting page theming

* chore: my issue page theming

* chore: cmdk theming

* chore: change hardcode bg and text color to theme

* chore: change color name according to the design

* style: fix card in the dashboard

* style: fix merge conflict design issues

* style: add light high contrast and dark high contrast

* style: fix cmd k menu color and selection

* feat: change theme from cmdk menu

* chore: add multiple theme field to custom theme

* chore: removed custom theming

* fix: build error

---------

Co-authored-by: Saheb Giri <iamsahebgiri@gmail.com>

apps/app/layouts/default-layout/index.tsx

@@ -21,7 +21,7 @@ type Props = {
 
 const DefaultLayout: React.FC<Props> = ({ meta, children }) => (
   <Container meta={meta}>
-    <div className="w-full h-screen overflow-auto bg-gray-50">
+    <div className="w-full h-screen overflow-auto bg-brand-base">
       <>{children}</>
     </div>
   </Container>