[Content]: Store docs page

📚 Subject area/topic

Store

📋 Page(s) affected (or suggested, for new content)

https://docs.solidjs.com/concepts/stores

📋 Description of content that is out-of-date or incorrect

There are opportunities to improve phrasing, clarity, organization of information, as well as correct a couple simple factual errors on the store docs page.

For a comprehensive, "code complete" accounting of possible changes, see https://github.com/solidjs/solid-docs-next/pull/770

🖥️ Reproduction in StackBlitz (if reporting incorrect content or code samples)

No response

从 https://docs.solidjs.com/concepts/stores 的 Store 页面开始，并将其与 pull request 770 中的完整变更列表进行比较。找出其中描述的措辞、组织结构和事实方面的问题，然后在应用这些已记录的修正和改进后，将该页面视为完成。