Merge #1741

1741: Improve `HttpRequests` r=Strift a=flevi29

# Pull Request

Sorry for the huge PR, but `HttpRequests` is core, and is used everywhere.

## What does this PR do?
- completely refactors [http-requests.ts](https://github.com/meilisearch/meilisearch-js/blob/main/src/http-requests.ts)
  - fixes #1654
  - request parameters are now simple and straight forward
  - types are reworked and no longer confusing
  - makes full use of [URL](https://developer.mozilla.org/en-US/docs/Web/API/URL), [Headers](https://developer.mozilla.org/en-US/docs/Web/API/Headers) and [URLSearchParams](https://developer.mozilla.org/en-US/docs/Web/API/URLSearchParams) web standard features, which are safer and easier to work with
  - makes use of [Private properties](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Classes/Private_properties) to hide internal implementation that should not be public (this is [widely supported](https://caniuse.com/mdn-javascript_classes_private_class_fields) and [polyfillable](https://babeljs.io/docs/babel-plugin-transform-private-methods))
- fixes some `EnqueuedTaskObject`s not being converted to `EnqueuedTask`

> [!CAUTION]
> #### BREAKING
> Rename `Config.requestConfig` -> `Config.requestInit`, `signal` can no longer be passed to it.

> [!WARNING]
> Deprecate `Config.httpClient` #1824 

## PR checklist
Please check if your PR fulfills the following requirements:
- [x] Does this PR fix an existing issue, or have you listed the changes applied in the PR description (and why they are needed)?
- [x] Have you read the contributing guidelines?
- [x] Have you made sure that the title is accurate and descriptive of the changes?

Thank you so much for contributing to Meilisearch!


Co-authored-by: F. Levi <55688616+flevi29@users.noreply.github.com>

Author: meili-bors[bot]

src/batch.ts

@@ -5,7 +5,7 @@ import type {
   BatchesResults,
   BatchesResultsObject,
 } from "./types.js";
-import { HttpRequests, toQueryParams } from "./http-requests.js";
+import { HttpRequests } from "./http-requests.js";
 
 class Batch {
   uid: BatchObject["uid"];
@@ -41,8 +41,9 @@ class BatchClient {
    * @returns
    */
   async getBatch(uid: number): Promise<Batch> {
-    const url = `batches/${uid}`;
-    const batch = await this.httpRequest.get<BatchObject>(url);
+    const batch = await this.httpRequest.get<BatchObject>({
+      path: `batches/${uid}`,
+    });
     return new Batch(batch);
   }
 
@@ -52,13 +53,11 @@ class BatchClient {
    * @param parameters - Parameters to browse the batches
    * @returns Promise containing all batches
    */
-  async getBatches(parameters: BatchesQuery = {}): Promise<BatchesResults> {
-    const url = `batches`;
-
-    const batches = await this.httpRequest.get<Promise<BatchesResultsObject>>(
-      url,
-      toQueryParams<BatchesQuery>(parameters),
-    );
+  async getBatches(batchesQuery?: BatchesQuery): Promise<BatchesResults> {
+    const batches = await this.httpRequest.get<BatchesResultsObject>({
+      path: "batches",
+      params: batchesQuery,
+    });
 
     return {
       ...batches,