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

routes/files.tsx

@@ -11,6 +11,7 @@ interface Data {
   currentPath: string;
   baseUrl: string;
   isFileSharingAllowed: boolean;
+  areDirectoryDownloadsAllowed: boolean;
 }
 
 export const handler: Handlers<Data, FreshContextState> = {
@@ -40,6 +41,7 @@ export const handler: Handlers<Data, FreshContextState> = {
     const userFiles = await FileModel.list(context.state.user.id, currentPath);
 
     const isPublicFileSharingAllowed = await AppConfig.isPublicFileSharingAllowed();
+    const areDirectoryDownloadsAllowed = await AppConfig.areDirectoryDownloadsAllowed();
 
     return await context.render({
       userDirectories,
@@ -47,6 +49,7 @@ export const handler: Handlers<Data, FreshContextState> = {
       currentPath,
       baseUrl,
       isFileSharingAllowed: isPublicFileSharingAllowed,
+      areDirectoryDownloadsAllowed,
     });
   },
 };
@@ -60,6 +63,7 @@ export default function FilesPage({ data }: PageProps<Data, FreshContextState>)
         initialPath={data.currentPath}
         baseUrl={data.baseUrl}
         isFileSharingAllowed={data.isFileSharingAllowed}
+        areDirectoryDownloadsAllowed={data.areDirectoryDownloadsAllowed}
       />
     </main>
   );