feat: modrinth hosting - files tab refactor (#4912)

* feat: api-client module for content v0

* feat: delete unused components + modules + setting

* feat: xhr uploading

* feat: fs module -> api-client

* feat: migrate files.vue to use tanstack

* fix: mem leak + other issues

* fix: build

* feat: switch to monaco

* fix: go back to using ace, but improve preloading + theme

* fix: styling + dead attrs

* feat: match figma

* fix: padding

* feat: files-new for ui page structure

* feat: finalize files.vue

* fix: lint

* fix: qa

* fix: dep

* fix: lint

* fix: lockfile merge

* feat: icons on navtab

* fix: surface alternating on table

* fix: hover surface color

---------

Signed-off-by: Calum H. <contact@cal.engineer>
Co-authored-by: Prospector <6166773+Prospector@users.noreply.github.com>

packages/api-client/src/core/abstract-upload-client.ts

@@ -0,0 +1,21 @@
+import type { UploadHandle, UploadRequestOptions } from '../types/upload'
+
+/**
+ * Abstract base class defining upload capability
+ *
+ * All clients that support file uploads must extend this class.
+ * Platform-specific implementations should provide the actual upload mechanism
+ * (e.g., XHR for browser environments).
+ *
+ * Upload goes through the feature chain (auth, retry, circuit-breaker, etc.)
+ * just like regular requests.
+ */
+export abstract class AbstractUploadClient {
+	/**
+	 * Upload a file with progress tracking
+	 * @param path - API path (e.g., '/fs/create')
+	 * @param options - Upload options including file, api, version
+	 * @returns UploadHandle with promise, onProgress chain, and cancel method
+	 */
+	abstract upload<T = void>(path: string, options: UploadRequestOptions): UploadHandle<T>
+}