🐛 fix: Some minor features optimization

[ModestFun]

1. export type NodeProps
2. export screenToFlowPosition for FlowEditorInstance
3. fix bug: FlowEditor won't always loading when nodes empty
4. add deselectAll before delete
5. add deleteNodes and deleteEdges function

[github-actions]

🎊 PR Preview 4e8e4e5 has been successfully built and deployed to https://ant-design-pro-flow-preview-pr-83.surge.sh

🕐 Build time: 64.605s

_{🤖 By surge-preview}

[codecov-commenter]

Codecov Report

Attention: 77 lines in your changes are missing coverage. Please review.

Comparison is base (ab3a670) 2.08% compared to head (4e8e4e5) 2.07%.
Report is 1 commits behind head on master.

Files	Patch %	Lines
src/FlowEditor/container/FlowEditor.tsx	0.00%	18 Missing ⚠️
src/BasicGroupNode/demos/data.ts	0.00%	14 Missing ⚠️
src/FlowEditor/store/slices/nodesSlice.ts	0.00%	13 Missing ⚠️
src/FlowEditor/store/slices/edgesSlice.ts	0.00%	9 Missing ⚠️
src/FlowView/demos/data.tsx	0.00%	8 Missing ⚠️
docs/caseShow/demos/pipelineDemo.tsx	0.00%	3 Missing ⚠️
src/FlowEditor/store/slices/generalActionSlice.ts	0.00%	3 Missing ⚠️
src/FlowEditor/hooks/useFlowEditor.ts	0.00%	2 Missing ⚠️
src/FlowView/provider/FlowViewProvider.tsx	0.00%	2 Missing ⚠️
src/FlowView/provider/provider.ts	0.00%	2 Missing ⚠️
... and 3 more

Additional details and impacted files

@@            Coverage Diff            @@
##           master     #83      +/-   ##
=========================================
- Coverage    2.08%   2.07%   -0.01%     
=========================================
  Files         148     148              
  Lines        9365    9390      +25     
  Branches      174     174              
=========================================
  Hits          195     195              
- Misses       9170    9195      +25     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

[github-actions]

🎉 This PR is included in version 1.2.2 🎉

The release is available on:

• npm package (@latest dist-tag)
• GitHub release

Your semantic-release bot 📦🚀