fix(mdxish): render footnote refs in table

[maximilianfalco]

🎫 Resolve RM-16727

🎯 What does this PR do?

[^1] inside <Table> / <table> cells rendered as literal text and produced no footnote section. mdxishTables re-parses each table block through an isolated processor, and remark-gfm only tokenizes a footnote reference when the matching definition lives in the same parse context, so cell text stayed literal, and with no references emitted the outer document's definition was orphaned and remark-rehype dropped the <section>.

The fix collects every footnote id from the outer tree once and primes the table and cell re-parses with synthetic [^id]: x placeholders so refs tokenize correctly; the synthetic definitions are then stripped from the cell scope so only the real outer-document definition reaches the renderer.

🧪 QA tips

Verify that both tables render footnotes correctly

<Table>
  <thead>
    <tr><th>Term</th><th>Definition</th></tr>
  </thead>
  <tbody>
    <tr>
      <td>Example[^1]</td>
      <td>See footnote</td>
    </tr>
  </tbody>
</Table>

[^1]: This footnote should render.

| Term         | Definition    |
| ------------ | ------------- |
| Example[^1]  | See footnote  |

[^1]: This footnote should render.

📸 Screenshot or Loom

Before	After

verified it works in the monorepo as well