Remove the unused maximumFontSize paragraph attribute

[conner1reimers]

Summary:

Fabric's ParagraphAttributes carries a maximumFontSize field, but it is not exposed by the <Text> or <TextInput> APIs, so normal JS usage leaves it as NaN. On iOS, RCTTextLayoutManager falls back to a 96pt maximum when it is NaN. On Android, the C++ side serializes it into MapBuffer key 7, but TextLayoutManager never reads that key.

This PR removes the attribute: the ParagraphAttributes field, its raw-prop parsing in conversions.h, the paragraph and text input prop entries, and MapBuffer key 7 on both the C++ and Kotlin sides.

• iOS: RCTTextLayoutManager now passes the largest font size in the attributed string to scaleFontSizeToFitSize: as the maximum instead of 96pt. scaleFontSizeToFitSize: returns early when the text already fits; otherwise scaleFontSizeWithRatio: applies MIN(pointSize * ratio, maximumFontSize) on each pass of a bisection over the ratio. With 96pt, fonts above 96pt were clamped to 96pt on every pass, and when that clamp alone made the text fit, the search went on to ratios above 1.0 and grew the remaining fonts up to 96pt. With the largest font size as the maximum the clamp is a no-op, the ratio-1.0 pass reproduces the original text, which is known not to fit, and every later pass shrinks. Fonts above 96pt are now scaled proportionally rather than capped, and text is never grown. Text at 96pt or smaller is unaffected.
• Android: PA_KEY_MAXIMUM_FONT_SIZE is removed. Nothing reads it, so there is no behavior change.

Split out of #58492. #58492 builds on this and reuses the largest-font-size helper for minimumFontScale.

Changelog:

[GENERAL] [REMOVED] - Remove the unused maximumFontSize paragraph attribute

Test Plan:

Unit tests

• Updated ParagraphAttributesTest.cpp for the removed field.
• Regenerated the C++ API snapshots (yarn cxx-api-build).

./gradlew :packages:react-native:ReactAndroid:testDebugUnitTest --tests 'com.facebook.react.views.text.*'

All 38 com.facebook.react.views.text tests pass.

[meta-codesync]

@javache has imported this pull request. If you are a Meta employee, you can view this in D120127100.