Feat: initialize the Apiserver framework (#2417)

* Feat: add kubeapi and mongodb datastore implementation

* Style: change kubeapi import code style

* Style: change mongodb package import code style

* Style: add some comment

* Style: change databasePrefix to tableNamePrefix

* Chore: install mongodb in unit-test job

* Chore: install mongodb in compatibility-test job

* Feat: add apiserver e2e test case

* Docs: change developer guide doc

* Feat: use common.Scheme

Co-authored-by: barnettZQG <yiyun.pro>

.github/workflows/unit-test.yml

@@ -72,7 +72,7 @@ jobs:
           version: 3.1.0
           kubebuilderOnly: false
           kubernetesVersion: v1.21.2
-
+      
       - name: Run Make test
         run: make test
 
@@ -81,5 +81,5 @@ jobs:
         with:
           token: ${{ secrets.CODECOV_TOKEN }}
           file: ./coverage.txt
-          flags: unittests
+          flags: core-unittests
           name: codecov-umbrella