Run prettier across the repo, exclude the lockfile from it

Prettier had never been run in --check mode here before, so this had
drifted across most files (markdown tables, long option() chains,
line wrapping). Purely formatting, no logic changes - needed so a CI
format:check gate can actually pass. Adds .prettierignore for
pnpm-lock.yaml specifically: prettier's YAML formatter rewrites every
quoted key (single -> double quotes) producing an ~8700-line diff of
pure noise on a file pnpm itself owns the formatting of.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

src/lib/runner/registry.ts

@@ -13,7 +13,8 @@ declare global {
  * Anchored on `globalThis` - see the comment in `runner/events.ts` for why a plain module-level
  * singleton isn't safe here (Next compiles Route Handlers through a separate module graph from
  * what `server.ts` requires directly). */
-const handles: Map<string, RunHandle> = globalThis.__triggershellRunHandles ?? new Map();
+const handles: Map<string, RunHandle> =
+  globalThis.__triggershellRunHandles ?? new Map();
 globalThis.__triggershellRunHandles = handles;
 
 export function registerRun(handle: RunHandle) {