Document modifyMutable

Suggested by Matthieu in Discord

Suggested by Mathieu on Discord

# Conflicts:
#	langs/ja/guides/testing.md

docs(ru): updated ts definitions for reactive utils, added some utils

docs(zh-cn): Update api doc

Fix link of `스프레드 구문`

Update getting-started.md to use esm.sh not skypack

docs(api): Fix md-links and bad brackets

Fix 'valueAccessor' spelling to match and add missing 'can'

This reverts commit 790079c.

We should point users to templates maintained by the solid team,
rather than templates maintained by vite. Even without this revert, the
link in the guide actually does point to the templates at
solidjs/templates, but the shell commands use create-vite.

Tell users to use solidjs/templates maintained by the solid team rather than create-vite

Fix function name in Solid Testing example

…th en

docs: The code for tutorial/stores_nested_reactivity is consistent with en

docs: use consistent and non-ambiguous event handler names

Fix typos in langs/zh-cn/tutorials/stores_nocontext/lesson.md

Fix typos in stores_context/lesson.md