docs(text): correct what the RTL notes say about table cells and lists

[DemchaAV]

Why

Four statements about right-to-left text no longer match the code.

• Three still say a table cell has no writing direction, which stopped being true when feat(api): let a table cell say which way its text runs #558 gave DocumentTableStyle a direction(...) of its own: the Hebrew invoice row and section in examples/README.md, and the PdfRenderEnvironment.markReorderedText Javadoc, which adds that a table cell is never reordered, although the table-cell path marks reordered text the way the paragraph and chip paths do.
• The Arabic article section says a list declares align(RIGHT) or its bullets land on the wrong side. align(RIGHT) moves each item to the right margin, but an item is still a left-to-right paragraph with the bullet as its text prefix, so the bullet stays at the item's left end.

The recipe catalogue row for text direction also named paragraphs only.

What changed

• examples/README.md: the Hebrew invoice row drops the stale reason, and the section says the line items are rows and that a table cell takes a writing direction through DocumentTableStyle.direction(...), which is what HebrewInvoiceExample's own Javadoc already says. The Arabic article section says what align(RIGHT) moves and what it leaves.
• docs/recipes.md: the text-direction row names table cells as well as paragraphs.
• PdfRenderEnvironment.markReorderedText Javadoc: set from the paragraph, chip and table-cell paths (PdfParagraphFragmentRenderHandler, PdfTableRowFragmentRenderHandler). Comment only.

Verification

• Documentation guards: core com.demcha.documentation.* plus EnginePdfBoundaryTest (links and anchors, recipe catalogue, canonical surface, coverage) 115 green; qa DocumentationSnippetCompileTest + DocumentationExamplesTest 18 green.
• RtlTableCellTest 8 green; javadoc:javadoc on graph-compose-render-pdf clean (0 warnings, 0 errors).
• Examples module (./mvnw -f examples/pom.xml test) 75 green.
• node knowledge/tools/claims/check-claims.mjs --check and node knowledge/tools/routing/check-routes.mjs green; git diff --check clean.

Notes

• Pairs with docs(recipes): say that a table cell takes a direction too #679, which fixes docs/recipes/text-direction.md itself. The two are independent: nothing here links to docs(recipes): say that a table cell takes a direction too #679's new anchor, so they merge in either order.
• Not covered here: the same list claim in the ArabicArticleExample Javadoc and code comment and in the released v2.2.0 CHANGELOG entry, and the README's Indic-reordering line, which needs its own investigation.

Lane: canonical — documentation and one Javadoc comment; no code.