[docs][examples] Update plain text and rich text examples

[MaxPlav]

1. Created the plain text example project react-plain-text.
2. Fixed an import error in the rich text example.
3. Update the examples links in the documentation to point StackBlitz instead of CodeSandbox.

Description

Closes #5989

Test plan

Rich text example:

rich-text.mov

Plain text example:

plain-text.mov

[vercel]

The latest updates on your projects. Learn more about Vercel for Git ↗︎

Name	Status	Preview	Comments	Updated (UTC)
lexical	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Jun 4, 2024 11:27pm
lexical-playground	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Jun 4, 2024 11:27pm

[github-actions]

size-limit report 📦

Path	Size
lexical - cjs	28.33 KB (0%)
lexical - esm	28.14 KB (0%)
@lexical/rich-text - cjs	36.77 KB (0%)
@lexical/rich-text - esm	28.1 KB (0%)
@lexical/plain-text - cjs	35.35 KB (0%)
@lexical/plain-text - esm	25.33 KB (0%)
@lexical/react - cjs	38.51 KB (0%)
@lexical/react - esm	29.12 KB (0%)

[StyleT]

LGTM overall! Awesome work

[StyleT]

IMO, we need to keep react-rich as simple as possible... I can kinda justify having AutoLinkPlugin and FloatingLinkEditorPlugin, but why do we need all the other things here?

Idea behind react-rich example is to serve as a good starting point for anyone who aims to create it's own Lexical baked editor. So people would add (not remove) features.

[StyleT]

I am really wondering if we need toolbar here... Shouldn't it have same features as vanilla-js?

The more complex examples are - the harder is to support them

[MaxPlav]

hi, the idea is to bring to the rich example all plugins and features from the CodeSandbox example https://codesandbox.io/p/sandbox/vigilant-kate-5tncvy?file=%2Fsrc%2Findex.js%3A11%2C16 as mentioned in #5989.
Alternatively, we can create a separate rich text example with a wider range of features, wdyt?

[StyleT]

I think each feature in the example shall serve an educational purpose. So it should be there for a reason.

And the fact that it was there in the old codesandbox isn’t a good enough reason to me :)

So unless we know why those features are needed there (ex: it’s an implementation example for particular documentation article) - I would remove them.

[MaxPlav]

I think each feature in the example shall serve an educational purpose. So it should be there for a reason.

And the fact that it was there in the old codesandbox isn’t a good enough reason to me :)

So unless we know why those features are needed there (ex: it’s an implementation example for particular documentation article) - I would remove them.

hi, thanks for the explanation! I've just removed extra plugins from both examples to keep the examples as simple as possible, and updated the screenshot videos.