[ISSUE #119] Fix latest version and language for version archives

[Pil0tXia]

Fixes #119.

Please merge this PR after #118.

Relevant pr: #108

1. Fixed 1.9.0 is released however 1.8.0 is displayed by default
2. Fixed English documents are displayed in Chinese site (in current or "Next" version)
3. Added missing json configuration to fix English columns are displayed in Chinese site (in 1.8.0/1.9.0 latest version)
4. Some doc title optimization
5. Fixed a document that didn't show up

Before

After

[Pil0tXia]

PR #108 introduced some bugs, basically all of which have been fixed by me. However, the current multi-version mechanism does not allow for version control in a single file.

To release a new version after merging this pr, you need to change the following locations:

zh doc: eventmesh-site\i18n\zh\docusaurus-plugin-content-docs\version-v1.9.0
zh column config: eventmesh-site\i18n\zh\docusaurus-plugin-content-docs\version-v1.9.0.json
en doc: eventmesh-site\versioned_docs\version-v1.9.0
eventmesh-site\versions.json

There is still one known issue: the historical version is only available in English, without Chinese. Since I don't know if the community needs these historical versions, I'll mention it in a new issue.