Port TS#61534: correct source location when react-jsx and whitespace before jsx

[Copilot]

JSX source location metadata (columnNumber in react-jsxdev output) was computed from node.Pos(), which includes leading trivia (whitespace). This produced incorrect column numbers when whitespace preceded JSX elements.

Ports microsoft/TypeScript#61534.

• Skip leading trivia via scanner.SkipTrivia() before using the position as the location in visitJsxElement, visitJsxSelfClosingElement, and visitJsxFragment

location := element.AsNode()
location.Loc = core.NewTextRange(scanner.SkipTrivia(tx.currentSourceFile.Text(), element.Pos()), element.End())
return tagTransform(tx, element.OpeningElement, element.Children, location)

Baseline diffs confirm column numbers now match TypeScript output across all affected react-jsxdev test cases.

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Pull request overview

This pull request ports TypeScript PR #61534 to fix incorrect JSX source location metadata (specifically columnNumber in react-jsxdev output) that occurred when whitespace preceded JSX elements. The fix ensures that column numbers now point to the actual start of the JSX tag rather than including leading whitespace.

Changes:

• Modified JSX transformation to skip leading trivia when computing source locations for react-jsxdev mode
• Updated all affected test baselines to match TypeScript's correct output

Reviewed changes

Copilot reviewed 33 out of 33 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
internal/transformers/jsxtransforms/jsx.go	Added trivia skipping logic to visitJsxElement, visitJsxSelfClosingElement, and visitJsxFragment functions to compute correct source positions
testdata/baselines/reference/submodule/conformance/*.diff	Reduced diff files showing convergence with TypeScript reference output
testdata/baselines/reference/submodule/conformance/*.js	Updated baselines with corrected column numbers matching TypeScript
testdata/baselines/reference/submodule/compiler/*.diff	Reduced diff files showing convergence with TypeScript reference output
testdata/baselines/reference/submodule/compiler/*.js	Updated baselines with corrected column numbers matching TypeScript