Change CCA chat sessions type

[osortega]

Using copilot-swe-agent type to maintain compatibility

[Copilot]

Pull Request Overview

This PR updates the chat session type identifier from copilot-cloud-agent to copilot-swe-agent throughout the codebase to maintain compatibility with the Copilot SWE Agent system.

Key Changes:

• Renamed the chat session type constant from copilot-cloud-agent to copilot-swe-agent
• Updated all references to this type across TypeScript code and package.json configuration
• Maintained all existing functionality with only the type identifier changing

Reviewed Changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated no comments.

File	Description
src/extension/chatSessions/vscode/chatSessionsUriHandler.ts	Updated URI handler to use copilot-swe-agent type when opening GitHub sessions
src/extension/chatSessions/vscode-node/copilotCloudSessionsProvider.ts	Changed the static TYPE constant to copilot-swe-agent
package.json	Updated chat session type references in command conditions and session provider configuration

[rebornix]

let's not merge this since it doesn't work as expected.