Copilot chat extension is using `localize` and not `vscode.l10.t`

[bpasero]

We need to replace all uses of localize in the Copilot Chat extension with vscode.l10.t calls. The localize method from VS Code must not be used.

Example: https://github.com/microsoft/vscode-copilot-chat/blob/c81452fecc9e79bcf3d7a2529156c28f9c1bad62/src/extension/conversation/vscode-node/languageModelAccess.ts#L163

Assigning some people based on blame info.

cc @TylerLeonhardt

[vs-code-engineering]

Hi @bpasero. As a member of the team, you can help us triage this issue by referring to https://github.com/microsoft/vscode-copilot/wiki/Copilot-Inbox-Tracker and assigning an owner directly.

[bpasero]

Fixing some agent provider related cases in microsoft/vscode-copilot-chat#2000

[TylerLeonhardt]

Yes, localize is a VS Code core concept and should never have been brought into an extension. Even core extensions use vscode.l10n.t...