Enable DataGridView dark mode theming via AppContext switch#14267

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LeafShi1 wants to merge 8 commits intodotnet:mainfrom

LeafShi1:Issue_14266_Add_DarkThemeExtensions

Commits on Feb 4, 2026

Add theming API and improve selection/grid readability
LeafShi1
committed

Commits on Feb 5, 2026

Update DarkThemePalette
LeafShi1
committed

Commits on Feb 9, 2026

Update the sorting icon in the column headers so it appears white in Dark Mode.
LeafShi1
committed

Commits on Feb 10, 2026

Commits on Feb 12, 2026