add localization for extension

[iisaduan]

fixes #3719

Previously,

• the English definitions were in the VSCode extension: vscode/typescript-language-features
• non English localizations were located here with the rest of VSCode translations and would automatically be installed/used when using VSCode's language packs: https://github.com/microsoft/vscode-loc

The localizations can be tested by switching your language (ctrl + shift + P, Configure Display Language) to qps-ploc. (qps-ploc generated by npx @vscode/l10n-dev generate-pseudo -o ./l10n/ ./l10n/bundle.l10n.json ./package.nls.json)

[Copilot]

Pull request overview

Adds localization support for the VS Code native-preview extension by introducing package/runtime localization files and replacing many user-facing strings with localized equivalents.

Changes:

• Adds package.nls.json and runtime l10n/bundle.l10n.json.
• Updates package.json metadata/configuration strings to use NLS keys and declares an l10n folder.
• Wraps many extension UI messages, quick-pick labels, status text, and errors with vscode.l10n.t.

Reviewed changes

Copilot reviewed 9 out of 9 changed files in this pull request and generated 7 comments.

Show a summary per file

File	Description
_extension/package.json	Enables extension localization and localizes selected manifest metadata/configuration strings.
_extension/package.nls.json	Adds package manifest localization keys.
_extension/l10n/bundle.l10n.json	Adds runtime localization bundle entries for vscode.l10n.t strings.
_extension/src/client.ts	Localizes language client messages and restart/crash UI text.
_extension/src/commands.ts	Localizes a command argument error message.
_extension/src/extension.ts	Localizes activation/configuration warning and output messages.
_extension/src/languageFeatures/sourceDefinition.ts	Localizes source-definition command messages.
_extension/src/projectStatus.ts	Localizes project status UI strings.
_extension/src/session.ts	Localizes session commands, profiling messages, version selection, and prompts.

[DanielRosenwasser]

I don't think prepending the icon is appropriate - it won't work well for right-to-left languages.

I think ideally you should place the $() placeholders in the string itself.

Suggested change

	label: "$(refresh) " + vscode.l10n.t("Restart Server"),
	description: vscode.l10n.t("Restart the TypeScript Native Preview language server"),
	label: vscode.l10n.t("$(refresh) Restart Server"),
	description: vscode.l10n.t("Restart the TypeScript Native Preview language server"),

and the same for the strings below.

I do see some instances in the VSCode codebase where some strings use vscode.l10n.t("{0} Do action", "$(icon)"), but I don't think that's necessary.

[DanielRosenwasser]

I think it's helpful for testing on this PR, but I'd say it's better not to check this in and add an entry to scripts to generate this on the fly.

[DanielRosenwasser]

I think you'll need to modify the statusBar.ts too.

I don't know if text in the output channel need to be localized. I'm leaning against that right now.

[DanielRosenwasser]

This, PID, and "manage workspace trust..." need to be localized