[Feature]: Code blocks are searchable.

[jheng-jie]

What problem does this feature solve?

Some feature descriptions may be included within code blocks, and sometimes .md files are generated automatically, identifying content from comments during generation. Therefore, the search functionality really needs to be able to search within code blocks.

What does the proposed API look like?

Make it configurable in the settings file.

[Timeless0911]

We will complete this feature in the development of v2 version, and PR is welcome if you are interested.