update d.ts in copilot

[aeschli]

No description provided.

[Copilot]

Pull request overview

This PR updates the Copilot extension’s bundled proposed VS Code API typings and aligns Copilot’s custom agents session service with the newer on-demand vscode.chat.getCustomAgents(...) API, plus bumps the tracked vscodeCommit.

Changes:

• Extend lm.startMcpGateway proposed API typing to accept an optional chatSessionResource URI.
• Sync chatPromptFiles proposed typings to include richer resource types (custom agents, instructions, skills, slash commands) and add on-demand get* APIs with deprecations for snapshot properties.
• Refactor Copilot’s ChatCustomAgentsService to use vscode.chat.getCustomAgents(token) instead of parsing prompt files itself, and update the shared service interface type.

Show a summary per file

File	Description
extensions/copilot/src/extension/vscode.proposed.mcpServerDefinitions.d.ts	Adds optional chatSessionResource parameter to startMcpGateway typing.
extensions/copilot/src/extension/vscode.proposed.chatPromptFiles.d.ts	Syncs proposed typings: introduces typed chat resources and on-demand getters with deprecations.
extensions/copilot/src/extension/chatSessions/vscode-node/chatCustomAgentsService.ts	Switches to vscode.chat.getCustomAgents(token) and stores typed ChatCustomAgent results.
extensions/copilot/src/extension/chatSessions/common/chatCustomAgentsService.ts	Updates service interface to return readonly ChatCustomAgent[].
extensions/copilot/package.json	Updates vscodeCommit to a newer upstream commit.

Copilot's findings

• Files reviewed: 3/5 changed files
• Comments generated: 1