Cloud: support alternate auth token from environment

[jr]

We may need to eventually consider refreshing the token and extracting information from it, but for now I think this should be sufficient.

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Important

Add static token authentication support and refactor authentication services for modularity and testing.

• Authentication:
  • Add StaticTokenAuthService for static token authentication in StaticTokenAuthService.ts.
  • Modify CloudService to use StaticTokenAuthService if ROO_CODE_CLOUD_TOKEN is set, otherwise use WebAuthService.
  • Refactor AuthService into WebAuthService and StaticTokenAuthService.
• Refactoring:
  • Move AuthService interface to AuthService.ts.
  • Rename AuthService.ts to WebAuthService.ts.
  • Update imports to use new paths in CloudService.ts, SettingsService.ts, ShareService.ts, and TelemetryClient.ts.
• Testing:
  • Add tests for StaticTokenAuthService in StaticTokenAuthService.spec.ts.
  • Update tests for WebAuthService in WebAuthService.spec.ts.
  • Update mocks and tests in CloudService.test.ts and ShareService.test.ts to reflect new authentication structure.

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[delve-auditor]

✅ No security or compliance issues detected. Reviewed everything up to 8f89b0f.

Security Overview

• 🔎 Scanned files: 12 changed file(s)

Detected Code Changes

Change Type	Relevant files
Enhancement	► CloudService.ts     Add support for alternate auth token from environment ► auth/WebAuthService.ts     Refactor existing auth service ► auth/StaticTokenAuthService.ts     Implement static token auth service ► auth/AuthService.ts     Define auth service interface ► auth/index.ts     Export auth services and types
Refactor	► SettingsService.ts     Update auth service imports ► ShareService.ts     Update auth service imports ► TelemetryClient.ts     Update auth service imports

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