Doc requests for Function Mesh v0.7.0 Release

[Huanli-Meng]

PM: Tian Fang

• Use init container to download packages and functions function-mesh#411
• https://github.com/streamnative/function-mesh-worker-service/pull/401
• https://github.com/streamnative/function-mesh-worker-service/pull/448
• Doc release note
• Version matrix between FM and FM worker service

[Huanli-Meng]

All doc-required PRs have been updated with docs. Therefore, close this issue.