refactor!: overhaul core classes and remove redundant code (#388)

* feat(Player.ts): append `cver` to deciphered URLs

* refactor(Actions.ts): remove redundant `getVideoInfo` function

This is leftover code from previous versions. It had many problems and it is no longer required.

* fix(Kids.ts): remove unneeded `await` keywords

* dev: add more endpoints

* chore: update deps

* refactor: separate endpoints into files

* dev: improve types

* dev: add more endpoints

* refactor: put clients in a separate directory inside `core`

* chore: lint

* refactor: move mixins and managers to separate folders

* chore: fix tests

* dev: add `CreateVideoEndpoint`

* chore: clean up

* chore: lint

* chore: add some comments

* chore: remove unnecessary test

* dev: add `playlist/CreateEndpoint`

* dev: add `playlist/DeleteEndpoint`

* dev: add `browse/EditPlaylistEndpoint`

* fix(parser): add a few checks to avoid parsing errors

src/core/endpoints/upload/CreateVideoEndpoint.ts

@@ -0,0 +1,37 @@
+import type { ICreateVideoRequest, CreateVideoEndpointOptions } from '../../../types/index.js';
+
+export const PATH = '/upload/createvideo';
+
+/**
+ * Builds a `/upload/createvideo` request payload.
+ * @param opts - The options to use.
+ * @returns The payload.
+ */
+export function build(opts: CreateVideoEndpointOptions): ICreateVideoRequest {
+  return {
+    resourceId: {
+      scottyResourceId: {
+        id: opts.resource_id.scotty_resource_id.id
+      }
+    },
+    frontendUploadId: opts.frontend_upload_id,
+    initialMetadata: {
+      title: {
+        newTitle: opts.initial_metadata.title.new_title
+      },
+      description: {
+        newDescription: opts.initial_metadata.description.new_description,
+        shouldSegment: opts.initial_metadata.description.should_segment
+      },
+      privacy: {
+        newPrivacy: opts.initial_metadata.privacy.new_privacy
+      },
+      draftState: {
+        isDraft: !!opts.initial_metadata.draft_state.is_draft
+      }
+    },
+    ...{
+      client: opts.client
+    }
+  };
+}