docs: fix 12 typos in READMEs and changelog

[Avicennasis]

Summary

Fixes 12 typos and grammar errors across 6 documentation files. No functional changes - documentation and changelog prose only.

README.md

• Copy each widgets' \.mpk`->each widget's` (singular possessive; the plural possessive uses elsewhere in the file, e.g. "the widgets' changelogs", are correct and were left alone)
• `NativeModileResources._WidgetExport` -> NativeMobileResources (the module is spelled NativeMobileResources in 18 other places in this repo, including line 81 of this same file)

packages/jsActions/nanoflow-actions-native/CHANGELOG.md

• enum is introduce for -> is introduced for
• We introdcued a new [Reload] action -> We introduced

packages/pluggableWidgets/gallery-native/README.md

• when the users reaches the bottom -> when the user reaches
• when the end-user swipe down of the list -> swipes down on the list (matches the third-person phrasing of the neighbouring "On Click Action" entry)

packages/pluggableWidgets/bottom-sheet-native/README.md

• Styles all basic items which has "<x>" style selected -> which have, in all four ModalItemsStyle rows (default / primary / danger / custom)

packages/pluggableWidgets/carousel-native/README.md

• pagination buttons becomes text like "1/5" -> buttons become

scripts/release/README.md

• an appropriate change to it's \package.json`->its`

Note on whitespace

The bottom-sheet and carousel changes sit inside markdown tables, so the column padding shifted. Both files were re-run through Prettier (--prose-wrap preserve --tab-width 4 --print-width 120), which reproduced them byte-identically before the edit, so the extra whitespace-only lines in those two tables are exactly what the repo's own formatter produces. Happy to drop the carousel table's padding-only lines if you would rather keep the diff to a single line.