[Workspace] Add a workspace client in workspace plugin

[SuZhou-Joe]

Description

This PR mainly introduces a workspace client to perform CRUD operations request to server side and gives some useful utils function.

Issues Resolved

closes #6093

Screenshot

As the changes only happen in a frontend client, there is no screenshot for that.

Testing the changes

• Clone the branch and enable workspace in yml file.
• Open the file src/plugins/workspace/public/plugin.ts
• Perform some operations through the initialized workspaceClient like: workspaceClient.create, workspaceClient.delete and so on, it should making http request to server accordingly in browser side.

Check List

• [x] All tests pass
  • [x] yarn test:jest
  • [x] yarn test:jest_integration
• [x] New functionality includes testing.
• [x] New functionality has been documented.
• [x] Update CHANGELOG.md
• [x] Commits are signed per the DCO using --signoff

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 75.00000% with 16 lines in your changes are missing coverage. Please review.

Project coverage is 67.14%. Comparing base (362ab1e) to head (65fc363).

Files	Patch %	Lines
src/plugins/workspace/public/workspace_client.ts	72.41%	10 Missing and 6 partials :warning:

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #6094      +/-   ##
==========================================
+ Coverage   67.13%   67.14%   +0.01%     
==========================================
  Files        3324     3326       +2     
  Lines       64330    64394      +64     
  Branches    10347    10358      +11     
==========================================
+ Hits        43188    43239      +51     
- Misses      18618    18626       +8     
- Partials     2524     2529       +5     

Flag	Coverage Δ
Linux_1	31.73% <75.00%> (+0.06%)	:arrow_up:
Linux_2	55.23% <ø> (ø)
Linux_3	44.71% <ø> (+<0.01%)	:arrow_up:
Linux_4	35.08% <ø> (ø)
Windows_1	31.75% <75.00%> (+0.06%)	:arrow_up:
Windows_2	55.20% <ø> (ø)
Windows_3	44.73% <ø> (ø)
Windows_4	35.08% <ø> (ø)

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[SuZhou-Joe]

@BionIT Could you please take a look here to see if all the comments have been addressed?