Adopt unified js/ts setting for suggest

[mjbvz]

Fixes #292934

[Copilot]

Pull request overview

This PR migrates TypeScript/JavaScript suggest-related settings from separate javascript.* and typescript.* configurations to a unified js/ts.* configuration scheme. This is part of a larger effort (#292934) to modernize and consolidate TypeScript language feature settings.

Changes:

• Added 12 new unified js/ts.* suggest settings with appropriate tags (JavaScript/TypeScript) and language-overridable scope
• Deprecated existing javascript.* and typescript.* versions of these settings with markdown deprecation messages
• Updated all code to use the new readUnifiedConfig() helper function, which checks the unified setting first before falling back to language-specific settings
• Updated test utilities to reference the new unified setting names

Reviewed changes

Copilot reviewed 8 out of 8 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
extensions/typescript-language-features/package.json	Adds new unified js/ts.* suggest settings and marks old javascript.*/typescript.* versions as deprecated
extensions/typescript-language-features/package.nls.json	Adds localization strings for deprecation messages of old settings
extensions/typescript-language-features/src/languageProvider.ts	Updates suggestionActions.enabled to use readUnifiedConfig
extensions/typescript-language-features/src/languageFeatures/completions.ts	Updates completion-related settings (completeFunctionCalls, paths, autoImports, names, enabled) to use readUnifiedConfig
extensions/typescript-language-features/src/languageFeatures/fileConfigurationManager.ts	Updates multiple suggest settings in preferences (includeAutomaticOptionalChainCompletions, generateReturns, includeCompletionsForImportStatements, classMemberSnippets, objectLiteralMethodSnippets, autoImports) to use readUnifiedConfig
extensions/typescript-language-features/src/languageFeatures/jsDocCompletions.ts	Updates suggest.completeJSDocs to use readUnifiedConfig
extensions/typescript-language-features/src/test/testUtils.ts	Updates test configuration key from typescriptCompleteFunctionCalls to completeFunctionCalls to use the new unified setting name
extensions/typescript-language-features/src/test/smoke/completions.test.ts	Updates all test usages of completeFunctionCalls setting to use the new unified key