Add a Comparatives entry to the English style catalog

[alexander-yevsyukov]

Problem

The catalog has no entry for comparatives that drop their function words, so
the fixer walks past constructions like:

• "greater or equal zero" → greater than or equal to zero
• "less or equal zero" → less than or equal to zero
• "equal or greater than 10" → greater than or equal to 10

There was no existing home for this. Prepositions opens with "Fix only the
pairs listed here" and is scoped to verb–preposition pairings; "than" is a
conjunction, not a preposition. Confusables covers writing "then" for
"than", which is a different error.

This is a calque of the Russian «больше или равно X», where the comparative
governs the case of the noun and no separate function word surfaces — the same
interference pattern the catalog already documents for articles and for
"allows to do".

Where it surfaced

SpineEventEngine/time, in the Javadoc of LocalDates.checkDate:

<li>the day is less or equal zero or greater than can be in the month.

It survived a full proofread sweep of that repository, which is what exposed
the gap.

What this adds

A ### Comparatives section between Verb complementation and Commas —
with the grammar entries, ahead of the mechanics ones. It follows the house
layout: rationale paragraph, Before/After table, Leave alone: guards.

The guards keep the fixer off:

• already-complete "greater than or equal to" / "less than or equal to";
• >=, <=, a >= b inside code spans — code tokens, not prose;
• "at least" / "at most" / "no less than" idioms, complete without "or equal";
• transitive "equals" — "the result equals zero" takes no "to".

Notes

• Documentation only; no skill or script changes. No skill hard-codes the
  catalog's topic list — proofread groups its report by whatever headings the
  file contains — so this needs no lockstep update.
• The second commit reflows two runts the review-docs prose-flow check found
  in the first. Table cells use the house alignment; no changed line exceeds
  the 100-character limit.

[Copilot]

Pull request overview

Adds a new “Comparatives” entry to the English style catalog to cover comparative constructions that omit required function words (e.g., “less or equal zero”), filling a gap that existing sections (Prepositions/Confusables) don’t address.

Changes:

• Introduces a ### Comparatives section with rationale, before/after examples, and “Leave alone” guards.
• Places the new section between “Verb complementation” and “Commas” to keep grammar topics grouped ahead of mechanics.

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