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

lib/config.ts

@@ -22,6 +22,7 @@ export class AppConfig {
       files: {
         rootPath: 'data-files',
         allowPublicSharing: false,
+        allowDirectoryDownloads: true,
       },
       core: {
         enabledApps: ['news', 'notes', 'photos', 'expenses', 'contacts', 'calendar'],
@@ -179,6 +180,12 @@ export class AppConfig {
     return this.config.files.allowPublicSharing;
   }
 
+  static async areDirectoryDownloadsAllowed(): Promise<boolean> {
+    await this.loadConfig();
+
+    return this.config.files.allowDirectoryDownloads;
+  }
+
   static async getFilesRootPath(): Promise<string> {
     await this.loadConfig();