Added Gab Deck initial mvp

• Added:
- Gab Deck initial mvp

app/javascript/gabsocial/layouts/deck_layout.js

@@ -0,0 +1,45 @@
+import React from 'react'
+import PropTypes from 'prop-types'
+import {
+  CX,
+  BREAKPOINT_EXTRA_SMALL,
+} from '../constants'
+import { me } from '../initial_state'
+import DeckSidebar from '../components/sidebar/deck_sidebar'
+import WrappedBundle from '../features/ui/util/wrapped_bundle'
+
+class DeckLayout extends React.PureComponent {
+
+  render() {
+    const { children, title } = this.props
+
+    const mainBlockClasses = CX({
+      d: 1,
+      w1015PX: 1,
+      flexRow: 1,
+      jcEnd: 1,
+      py15: 1,
+      mlAuto: !me,
+      mrAuto: !me,
+    })
+
+    return (
+      <div className={[_s.d, _s.w100PC, _s.h100VH, _s.bgTertiary].join(' ')}>
+        <DeckSidebar />
+        <div className={[_s.d, _s.flexRow, _s.w100PC].join(' ')}>
+          <div className={[_s.d, _s.w76PX, _s.h100VH].join(' ')} />
+          <main role='main' className={[_s.d, _s.z1, _s.overflowXScroll, _s.noScrollbar].join(' ')}>
+            {children}
+          </main>
+        </div>
+      </div>
+    )
+  }
+
+}
+
+DeckLayout.propTypes = {
+  title: PropTypes.string,
+}
+
+export default DeckLayout