Summary

• Documents StartSearchFilter, EndSearchFilter, and WordStartSearchFilter (core #8328, #8319) for both Doctrine ORM and MongoDB ODM in core/doctrine-filters.md, including the #[QueryParameter] declaration, the exact LIKE/regex pattern each generates, and the case-sensitivity default for each backend.
• Splits the SearchFilter -> modern filter migration table row that previously mapped partial, start, end, word_start strategies all onto PartialSearchFilter, into distinct rows pointing at the new dedicated filters.
• Documents the FreeTextQueryFilter per-property array<string, FilterInterface> constructor argument (core #8257), with a worked example (partial match on title, exact match on isbn) and the behavior for a property missing from the map.
• Fills in the previously bare laravel/filters.md bullets for StartSearchFilter/EndSearchFilter with a working example, and notes there is no Eloquent equivalent of WordStartSearchFilter.
• Adds StartSearchFilter, EndSearchFilter, and WordStartSearchFilter to the summary filter list in core/filters.md, matching the existing ExactFilter/PartialSearchFilter entry shape and cross-linking to the new core/doctrine-filters.md sections.

Stacked on #2335

This branch is based on docs/backport-4.4-features (tip faba151f7b34ac52bee024bbb90b4dd1074cf39e), which already rewrites large parts of core/doctrine-filters.md and adds ~10 lines to core/filters.md. Please merge #2335 first, then rebase/merge this on top of it — basing on upstream/4.4 directly would conflict.

Verified against

• ApiPlatform\Doctrine\Orm\Filter\{Start,End,WordStart}SearchFilter and ApiPlatform\Doctrine\Odm\Filter\{Start,End,WordStart}SearchFilter at upstream/4.4 in api-platform/core.
• ApiPlatform\Laravel\Eloquent\Filter\{Start,End}SearchFilter at the same ref — confirmed no WordStartSearchFilter exists under src/Laravel/Eloquent/Filter/.
• ApiPlatform\Doctrine\{Orm,Odm}\Filter\FreeTextQueryFilter constructor (FilterInterface|array $filter) at the same ref.

Key findings baked into the docs:

• ORM string filters (Start/End/WordStart) default to case-insensitive (LOWER() comparison); ODM defaults to case-sensitive (regex without the i flag) — opposite defaults, both configurable via the caseSensitive constructor argument.
• ORM WordStartSearchFilter recognizes a word boundary only on a literal ASCII space (LIKE 'value%' OR LIKE '% value%'); ODM recognizes any whitespace character (\s) via (^value|\svalue).
• Laravel Start/EndSearchFilter use QueryPropertyTrait only (no NestedPropertyTrait), so unlike PartialSearchFilter they do not support dot-notation relation filtering.

Out of scope / left for other agents

• The pre-existing SearchFilter deprecation > [!WARNING] callout, and the RangeFilter/ComparisonFilter wording elsewhere in core/filters.md, were left untouched per instructions — owned by other agents.
• Noticed a pervasive pre-existing "chikens" typo (for "chickens") throughout the example URLs in core/doctrine-filters.md, predating this change. Deliberately left as-is — it's cosmetic and repeated across many examples, so it deserves its own PR rather than riding along in this one.