Use native private members in build tooling

[Bharat Middha (bmiddha)]

Summary

• convert TypeScript-private fields, methods, and accessors across Heft and Webpack plugins to ECMAScript #private members
• replace unsupported private-member destructuring with direct private access
• keep package behavior and public APIs unchanged

Validation

• built and tested all 18 affected packages
• 75 build/test operations passed, including Webpack 4 packages

[Copilot]

Pull request overview

Converts compile-time-private members in Heft and Webpack tooling to native ECMAScript #private members without changing public APIs or behavior.

Changes:

• Migrates private fields, methods, and accessors to native syntax.
• Updates internal references, including private-member destructuring.
• Covers Heft plugins and Webpack 4/5 tooling.

Reviewed changes

Copilot reviewed 37 out of 37 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
webpack/webpack5-module-minifier-plugin/src/ModuleMinifierPlugin.ts	Migrates minifier state.
webpack/webpack5-localization-plugin/src/TrueHashPlugin.ts	Migrates plugin options.
webpack/webpack5-localization-plugin/src/test/MemFSPlugin.ts	Migrates test filesystem state.
webpack/webpack5-localization-plugin/src/test/LocalizedRuntimeTestBase.ts	Migrates test plugin state.
webpack/webpack5-localization-plugin/src/LocalizationPlugin.ts	Migrates localization internals.
webpack/webpack4-module-minifier-plugin/src/PortableMinifierIdsPlugin.ts	Migrates minifier hooks.
webpack/webpack4-module-minifier-plugin/src/ModuleMinifierPlugin.ts	Migrates minifier state.
webpack/webpack4-module-minifier-plugin/src/AsyncImportCompressionPlugin.ts	Migrates compression hooks.
webpack/webpack4-localization-plugin/src/LocalizationPlugin.ts	Migrates localization internals.
webpack/webpack-workspace-resolve-plugin/src/WorkspaceResolvePlugin.ts	Migrates resolver state.
webpack/webpack-workspace-resolve-plugin/src/WorkspaceLayoutCache.ts	Migrates resolution context state.
webpack/webpack-workspace-resolve-plugin/src/KnownPackageDependenciesPlugin.ts	Migrates cache storage.
webpack/webpack-workspace-resolve-plugin/src/KnownDescriptionFilePlugin.ts	Migrates resolver options.
webpack/webpack-embedded-dependencies-plugin/src/EmbeddedDependenciesWebpackPlugin.ts	Migrates dependency-report internals.
webpack/webpack-deep-imports-plugin/src/DeepImportsPlugin.ts	Migrates path configuration.
webpack/set-webpack-public-path-plugin/src/SetPublicPathPluginBase.ts	Migrates plugin naming state.
webpack/set-webpack-public-path-plugin/src/SetPublicPathPlugin.ts	Migrates runtime module options.
webpack/hashed-folder-copy-plugin/src/HashedFolderDependency.ts	Migrates hashing internals.
heft-plugins/heft-webpack5-plugin/src/Webpack5Plugin.ts	Migrates Webpack 5 task state.
heft-plugins/heft-webpack5-plugin/src/DeferredWatchFileSystem.ts	Migrates watcher state.
heft-plugins/heft-webpack4-plugin/src/Webpack4Plugin.ts	Migrates Webpack 4 task state.
heft-plugins/heft-webpack4-plugin/src/DeferredWatchFileSystem.ts	Migrates watcher state.
heft-plugins/heft-typescript-plugin/src/TypeScriptPlugin.ts	Migrates helper methods.
heft-plugins/heft-typescript-plugin/src/TypeScriptBuilder.ts	Migrates compiler state and helpers.
heft-plugins/heft-typescript-plugin/src/fileSystem/TypeScriptCachedFileSystem.ts	Migrates filesystem caches.
heft-plugins/heft-serverless-stack-plugin/src/ServerlessStackPlugin.ts	Migrates SST task internals.
heft-plugins/heft-sass-plugin/src/SassProcessor.ts	Migrates Sass state and helpers.
heft-plugins/heft-rspack-plugin/src/RspackPlugin.ts	Migrates Rspack task state.
heft-plugins/heft-rspack-plugin/src/DeferredWatchFileSystem.ts	Migrates watcher state.
heft-plugins/heft-lint-plugin/src/Tslint.ts	Migrates TSLint internals.
heft-plugins/heft-lint-plugin/src/LintPlugin.ts	Migrates lint initialization state.
heft-plugins/heft-lint-plugin/src/LinterBase.ts	Migrates linter-name storage.
heft-plugins/heft-lint-plugin/src/Eslint.ts	Migrates ESLint internals.
heft-plugins/heft-jest-plugin/src/TerminalWritableStream.ts	Migrates terminal storage.
heft-plugins/heft-jest-plugin/src/JestPlugin.ts	Migrates Jest orchestration state.
heft-plugins/heft-jest-plugin/src/HeftJestReporter.ts	Migrates reporter state and helpers.
heft-plugins/heft-api-extractor-plugin/src/ApiExtractorPlugin.ts	Migrates API Extractor state.

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