chore(docs): update dependencies and adapt to zbsearch 4

fumadocs-core 16.14.5 switched its search engine from Orama to zbsearch 4,
so the panel docs follow it up to the same major.

zbsearch 4 still rejects locale codes as tokenizer languages ("en" throws,
only "english" is accepted), so the custom search dialog that forces an
English index stays necessary — verified by loading the built static index
for all four locales and searching it through fumadocs' own client.

Around that:
- use `staticClient`, as `oramaStaticClient` is now a deprecated alias
- drop @orama/orama, which nothing depends on or imports any more
- correct the two comments that still described Orama and pointed at its
  docs and tokenizer package, one of them suggesting a language zbsearch
  does not have
- restore the corepack integrity hash on `packageManager`, which CI reads
  through pnpm/action-setup
- prune minimumReleaseAgeExclude entries for versions no longer installed

The API reference MDX changes are serialization-only: fumadocs-openapi
11.2.4 emits plain scalars where it used folded ones. Parsed frontmatter
and page bodies are unchanged.

docs/pnpm-workspace.yaml

@@ -8,9 +8,8 @@ overrides:
   'postcss@<8.5.10': '^8.5.15'
   'sharp@<0.35.0': '^0.35.3'
 minimumReleaseAgeExclude:
-  - '@mermaid-js/parser@1.2.0'
-  - mermaid@11.16.0
-  - fumadocs-core@16.14.1
-  - fumadocs-ui@16.14.1
-  - lucide-react@1.29.0
+  - '@mermaid-js/parser@1.2.1'
+  - mermaid@11.17.0
+  - lucide-react@1.33.0
   - postcss@8.5.26
+  - fumadocs-mdx@15.3.0