feat(docs): Integrate Rust docs to our general mkDocs

[Mr-Leshiy]

Description

• Integrated Rust docs to the general docs building process
• Added corresponding links from mkDocs pages to the Rust docs

Related Issue(s)

Closes #148

Please confirm the following checks

• My code follows the style guidelines of this project
• I have performed a self-review of my code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• Any dependent changes have been merged and published in downstream module

[Mr-Leshiy]

docs: https://input-output-hk.github.io/catalyst-voices/branch/feat_rust_docs/

[Mr-Leshiy]

depends on input-output-hk/catalyst-ci#120