WIP: Documentation update

[kaisalmen]

This PR should include all changes to the documentation required for the monaco-languageclient v10 release.

This WIP and stays as Draft until we think is ready. @montymxb and @kaisalmen both write and review. The starting point is @montymxb work (partially hand-written, partially LLM generated content).

Completed first reviews/editing round (that alters some changes that are already available on dev branch):

• main directory (index.md, installation.md, introduction.md)
• basic-usage directory (index.md, getting-started.md, configuration.md, examples.md)

Needs rework:

• advanced-usage directory: The scope needs re-thought and the content needs to be condensed. There is too much redundancy

TODO/questions:

• guides directory: Do we need the performance guide right now?
• trouble shooting section from README should be moved to docs/guides/troubleshooting.md and the content from the README should be augmented
• faq.md: should this just augment the troubleshooting guide and then be merged in the process? There is already an overlap.
• guides/migration.md: We need to have a migration guide from v9 to v10. Especially explain how to treat the removal of monaco-editor-wrapper and how to use the three config types also in @typefox/monaco-editor-react. That should be done by @kaisalmen

Additional content/changes/alignments:

• Contains all diagrams to be used in the upcoming blog post.
• The bare example has been moved to the json client folder and been renamed to json_classic.ts. The main json example uses extended mode and both examples now make use of EditorApp.