This removes another blocker to full React 19 support, among other
things. It also adds the new `@docusaurus/plugin-svgr` plugin, which is
now required to load SVG assets.
The last blocker to React 19 is `@monaco-editor/react`, which has added
support in its release candidate for 4.7.0 and will hopefully release to
stable soon.
Adds instructions for using the tab bar, moves tab layout docs to new
location with redirect, adds instructions for magnifying a block, cleans
up intro text.
## Summary
We are moving our docsite to this repo for better coordination.
## What's changed?
- The docsite codebase is now in docs/
- The docsite will replace storybook as the published GitHub Pages site
for this repo
- Storybook will now be hosted at https://docs.waveterm.dev/storybook
- A new CI workflow will validate any changes to Storybook or the
docsite
- A combined CD workflow will build and deploy Storybook and the docsite
as a single artifact
- The Build Helper workflow will now build an embedded version of the
docsite before building the app, ensuring the docsite version it has is
always the latest
