Symlink on built website to support /docs/ links

[cason]

Possibly partially addressed #79.

Introduces a symbolic link making docs/ prefixed links to be accepted by the website. For example, https://docs.cometbft.com/v0.38/docs/core/configuration.html could be accepted and render the same content as the proper link: https://docs.cometbft.com/v0.38/core/configuration.html

[cason]

This MUST be reverted when merging.

[cason]

A previous attempt was performing adding the symbolic links as part of the make fetch command.

However, at the make build step jekyll ignores the symbolic links.

[cason]

The workflow does not use make build, invoking jekyll directly.

A possibility is to introduce a new make symlinks command to be executed after the building.

[cason]

While this procedure indeed produces the symlinks under _pages/, the updated website does not work as expected.

Either because the symlinks are not uploaded (properly), or because the web site configuration disables this behavior.