Update documentation to React 19

[kristersd]

React 19 is around corner and we should update hard-coded documentation keys to reflect the new API.

Acceptance criteria:

• /docs and /react-docs reflects the new documentation.
• Remove empty line-space after the brief description.

Considerations:

• Create scripts folder to have the documentation keys generation always present in the repository. This will allow to easily update the documentation, when there is some changes.