[Doc][plugin api] Add swagger documentation for all plugin APIs

[klesh]

Documentation Scope

Thanks to the contribution of #1900 from @xgdyp , we had swagger documentation support a long time ago. Which display our Framework APIs for developers, and they could test out the APIs easily on the swagger page. However, the plugin APIs documentation is still missing.

Describe the Change

Add swagger comment to all our plugins.

Plan of attacks

• #2450
• Update website doc according to #2450
• #2668
• Update website doc according to #2668
• swagger support for Github plugin #2697
• swagger support for Gitlab plugin #2698
• #2699
• Update website doc according to #2699
• #2701
• Update website doc according to #2701
• DBT
• Feishu #2707
• Gitee #2714
• GitExtractor
• Refdiff
• Add prefix framework/ to all framework api (modification is part of #2709)
• Add response body for all plugins response #2709
• Update POST /blueprints: tells the overall structure of the settings field, and where to look for plugin-specific structure. or we can go
• Add POST /plugins/<PLUGIN_NAME/blueprint-plan to describe plugin-specific structure #2734
• Update POST /pipelines: same thing to POST /blueprints#2735
• Add POST /plugins/<PLUGIN_NAME/pipeline-verify to verify the pipeline options for the plugin