Support downloading directories as a zip archive (#106)

* Add directory download as zip feature

Implements the ability for users to download directories as zip files if enabled in config. Adds a new API route for directory zipping, updates UI components to show a download button for directories, and introduces related config and type changes. Also includes a new download icon.

* Windows path bugfix

* Include empty directories in zip archive

* Address feedback

- `isDirectoryDownloadsAllowed` -> `areDirectoryDownloadsAllowed`
- send `parentPath` & `name` to API instead of resolving `fullPath` on client
- call `ensureUserPathIsValidAndSecurelyAccessible` before zipping
- set config `allowDirectoryDownloads` default to `false`
- add `zip` to Dockerfile and replace in-house zip algorithm
- replace `download.svg` with heroicon's `arrow-down-tray`
- `replace` with glob -> `replaceAll` with string

* Cleanup apt-get command

* Remove unused zip archive and directory functions

islands/files/FilesWrapper.tsx

@@ -7,6 +7,7 @@ interface FilesWrapperProps {
   initialPath: string;
   baseUrl: string;
   isFileSharingAllowed: boolean;
+  areDirectoryDownloadsAllowed: boolean;
   fileShareId?: string;
 }
 
@@ -18,6 +19,7 @@ export default function FilesWrapper(
     initialPath,
     baseUrl,
     isFileSharingAllowed,
+    areDirectoryDownloadsAllowed,
     fileShareId,
   }: FilesWrapperProps,
 ) {
@@ -28,6 +30,7 @@ export default function FilesWrapper(
       initialPath={initialPath}
       baseUrl={baseUrl}
       isFileSharingAllowed={isFileSharingAllowed}
+      areDirectoryDownloadsAllowed={areDirectoryDownloadsAllowed}
       fileShareId={fileShareId}
     />
   );