Basic footer structure and Cookie Consent (#4320)

* Added footer with blank links to be filled 
* Cookie consent to match V1 
* Made scrolling work on tool search results
* Made scrolling the same on tool search, tool picker and workbench 
* Cleaned up height variables, view height only used at workbench level 
<img width="1525" height="1270"
alt="{F3C1B15F-A4BE-4DF0-A5A8-92D2A3B14443}"
src="https://github.com/user-attachments/assets/0c23fe35-9973-45c0-85af-0002c5ff58d2"
/>
<img width="1511" height="1262"
alt="{4DDD51C0-4BC5-4E9F-A4F2-E5F49AF5F5FD}"
src="https://github.com/user-attachments/assets/2596d980-0312-4cd7-ad34-9fd3a8d1869e"
/>

---------

Co-authored-by: Connor Yoh <[email protected]>
Co-authored-by: James Brunton <[email protected]>

frontend/src/components/viewer/Viewer.tsx

@@ -439,7 +439,7 @@ const Viewer = ({
   }, [pageImages]);
 
   return (
-    <Box style={{ position: 'relative', height: '100vh', display: 'flex', flexDirection: 'column' }}>
+    <Box style={{ position: 'relative', height: '100%', display: 'flex', flexDirection: 'column' }}>
       {/* Close Button - Only show in preview mode */}
       {onClose && previewFile && (
         <ActionIcon
@@ -558,7 +558,7 @@ const Viewer = ({
               radius="xl xl 0 0"
               shadow="sm"
               p={12}
-              pb={24}
+              pb={12}
               style={{
                 display: "flex",
                 alignItems: "center",