[review] [Autoloop: build-tsikit-learn-scikit-learn-typescript-migration]

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This PR contains changes that were originally intended for PR #17 (autoloop/build-tsikit-learn-scikit-learn-typescript-migration).
Please review the changes carefully before merging.

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🔧 Evergreen CI Fix

I pushed a fix for the failing Build Playground, Lint, and Test checks (§28633606380).

Root Causes Fixed (31 files)

Duplicate exports (TS2308 in index files):

• Renamed QuantileTransformer → QuantileTransformerBinarizer in binarizer.ts
• Renamed GaussianRandomProjection/SparseRandomProjection/johnsonLindenstraussMinDim duplicates in random_proj_ext.ts, sparse_random.ts, random_proj_ext3.ts, random_projection_ext.ts
• Renamed inplaceColumnScale → inplaceColumnScaleDense in arrayfuncs.ts
• Renamed getConfig/setConfig → getGlobalConfig/setGlobalConfig in estimator_checks.ts

noUncheckedIndexedAccess (TS2532): Replaced arr[i] += x patterns with arr[i] = (arr[i] ?? 0) + x in preprocessing, tree, utils, semi_supervised, and svm files.

exactOptionalPropertyTypes (TS2375/TS2412): Used delete node.leftChild instead of node.leftChild = undefined, and conditional spread for optional property initialization.

Wrong import names: checkIsFitted → check_is_fitted (tree_ext2.ts); updated import path in categorical_nb.ts and feature_union.ts.

Other fixes: getParams → get_params, this type in inline objects, Float64Array.from() → new Float64Array(), Math.erf type assertion, Float64Array.flat() → flatMap(g => Array.from(g)), y.map(v => v >= 0) on typed array, deprecation base constructor type, bicluster lint (split const a, b).

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References:

• §28633606380

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