chore(docs): generate Typedoc handbook (force add ignored folder)

[Monika-Bolla]

Hello,

This PR generates the Typedoc handbook and includes the generated docs/handbook folder for preview.

What I did
Added typedoc.json to configure Typedoc (skip errors, exclude tests)
Ran Typedoc to build the handbook
Force-added the docs/handbook folder since it was gitignored

Why
Enables maintainers to easily preview the generated docs
Solves build issues where Typedoc previously failed due to TS errors

Let me know if you’d prefer me to set up a GitHub Action to build and deploy this instead of committing the docs folder

[bolt-new-by-stackblitz]

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[dariomannu]

Hi @Monika-Bolla the docs shouldn't be checked in git, as they're meant to be auto-generated. Otherwise you'll have these mega-commits with hundreds of "changed" files. If you can please take the actual docs off...

[dariomannu]

Hi @Monika-Bolla looks like you also removed manually-generated doc files, like [‎docs/migrating/angular.md](https://github.com/ReactiveHTML/rimmel/pull/55/files#diff-fb53612b98eb1a1752025b4cb841e0be64788d15f80a876cc7a0904789b35d15).

It's only the auto-generated Typedoc documentation that we need out of configuration management.

[dariomannu]

Whops... now you removed everything except that one file. If you check the "files changed" tab, you'll see what is going to be merged and check if it does indeed contain your changes and nothing else. Shout if you're stuck.