feat(richtext-lexical): allow disabling TabNode

[GermanJablo]

Similar to #11631.

IndentFeature causes pressing Tab in the middle of a block such as a paragraph or heading to insert a TabNode. This property allows you to disable this behavior, and indentation will occur instead if the block allows it.

Usage:

editor: lexicalEditor({
  features: ({ defaultFeatures }) => [
    ...defaultFeatures,
    IndentFeature({
      disableTabNode: true,
    }),
  ],
}),