feat(all): Task store

implements:
https://github.com/meilisearch/specifications/blob/develop/text/0060-refashion-updates-apis.md

linked PR:

- #1889
- #1891
- #1892
- #1902
- #1906
- #1911
- #1914
- #1915
- #1916
- #1918
- #1924
- #1925
- #1926
- #1930
- #1936
- #1937
- #1942
- #1944
- #1945
- #1946
- #1947
- #1950
- #1951
- #1957
- #1959
- #1960
- #1961
- #1962
- #1964

- https://github.com/meilisearch/milli/pull/414
- https://github.com/meilisearch/milli/pull/409
- https://github.com/meilisearch/milli/pull/406
- https://github.com/meilisearch/milli/pull/418

- close #1687
- close #1786
- close #1940
- close #1948
- close #1949
- close #1932
- close #1956

meilisearch-http/tests/documents/get_documents.rs

@@ -17,6 +17,7 @@ async fn error_get_unexisting_document() {
     let server = Server::new().await;
     let index = server.index("test");
     index.create(None).await;
+    index.wait_task(0).await;
     let (response, code) = index.get_document(1, None).await;
 
     let expected_response = json!({
@@ -43,7 +44,7 @@ async fn get_document() {
     ]);
     let (_, code) = index.add_documents(documents, None).await;
     assert_eq!(code, 202);
-    index.wait_update_id(0).await;
+    index.wait_task(0).await;
     let (response, code) = index.get_document(0, None).await;
     assert_eq!(code, 200);
     assert_eq!(
@@ -75,11 +76,13 @@ async fn error_get_unexisting_index_all_documents() {
 }
 
 #[actix_rt::test]
-async fn get_no_documents() {
+async fn get_no_document() {
     let server = Server::new().await;
     let index = server.index("test");
     let (_, code) = index.create(None).await;
-    assert_eq!(code, 201);
+    assert_eq!(code, 202);
+
+    index.wait_task(0).await;
 
     let (response, code) = index
         .get_all_documents(GetAllDocumentsOptions::default())