Configure proper redirect from all pages to now docs

[SergK]

We need to set up a redirect from the old documentation site (https://epam.github.io/edp-install/) to the appropriate page on the new documentation site (https://docs.kuberocketci.io/) using the mkdocs redirect plugin.

h4. Acceptance Criteria

• The mkdocs redirect plugin is properly configured in the mkdocs.yml file.
• All existing documentation links from https://epam.github.io/edp-install/ are mapped to their new counterparts on https://docs.kuberocketci.io/.
• A test is conducted for a set of old URLs to ensure they redirect correctly to the new URLs.
• Documentation is updated to include instructions on how to add new redirects in the future.