chore(Felt): set up React prerelease development branch

[gabipodolnikova]

What: Implements the React branch and prerelease configuration for PF-4694. Related to #12666.

• Migrate React packages, internal imports, examples, tests, scripts, and package configuration to @rh-felt.
• Initialize renamed publishable packages at 0.0.1-prerelease.0 with public access and the prerelease tag.
• Enable the release workflow and Lerna publishing on felt-v1.
• Configure Felt preview hostnames and route felt-v1 documentation to rh-felt-react-staging.patternfly.org.
• Update the ESM style-import transformer for Felt imports.
• Extend the existing ESLint import rule to support both PatternFly and Felt. Retain the plugin’s existing name and 6.6.0-prerelease.0 version.

Additional issues / pending setup:

• Configure Cloudflare DNS and Surge domain access for rh-felt-react-staging.patternfly.org. Verify npm publishing permissions for @rh-felt.
• The modified ESLint plugin remains eligible for publication under the shared eslint-plugin-patternfly-react package and prerelease tag; restoring its version does not exclude it from publishing.
• Merging into felt-v1 triggers the release workflow. npm publishing waits for CI and documentation jobs to succeed.
• after prerelease, update the react-docs/package.json to be dependent on new @rh-felt/* packages instead of @patternfly/*

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[gabipodolnikova]

/deploy-preview

[patternfly-build]

Preview: https://rh-felt-react-pr-12675.surge.sh

A11y report: https://rh-felt-react-pr-12675-a11y.surge.sh

[nicolethoen]

I think you should remove the - main in this file. This branch should only be triggering workflows on changes to this branch