fix: content corrections across liveblocks + yjs skills

[aribn]

Thanks for publishing these skills! Looking forward to putting them to good use. While reading through, I came across a handful of small issues in the examples and prose worth flagging. All fixes verified against current main. Happy to split this up or drop anything you'd rather handle differently.

A few things that would trip up agents copying examples verbatim

• liveblocks-best-practices/SKILL.md: the index entry reads primitive-components-parts (plural), but the file on disk is primitive-component-parts.md (singular). An agent following the index would hit a file-not-found.
• suspense-vs-regular-hooks.md: two import lines use @/liveblocks/react with a stray leading slash. The rest of the file already uses the correct @liveblocks/react.
• handling-connection-errors.md: the Other errors switch example declares const { roomId, threadId } across ~10 sibling cases without block scoping. Because all case clauses share one lexical scope, repeating those bindings throws SyntaxError: Identifier 'roomId' has already been declared at parse time. ROOM_CONNECTION_ERROR already has the right pattern with { }, so I applied the same shape to the rest.

A couple of markdown links that don't render

• suspense-vs-regular-hooks.md: two instances of [`useThreads`][https://…] (reference-style link with a URL literal instead of a label — renders as plain text), plus one empty shortcut [`ClientSideSuspense`][] with no matching reference definition. Swapped both for the inline [text](url) form.

One small math thing

• smoother-realtime-updates.md: "The minimum value is 16, once every 10ms, 60FPS." Since 1000 / 16 ≈ 62.5, the 16 and 60FPS are both right — just the "10ms" in the middle that's inconsistent. Changed to "once every 16ms".

Typos I noticed while reading through

• liveblocks-best-practices/SKILL.md: extgensions, losing losing, missing : after `prevent-unsaved-changes-being-lost`, multiplayer,commenting, pdates, and one lowercase sentence start
• ai-as-a-collaborator.md: colalborator
• yjs-best-practices/SKILL.md: lazy laoded
• smoother-realtime-updates.md: rooms will lots

Happy to split the correctness fixes from the typo cleanup into separate PRs if that's cleaner.