feat: add session archival and filtering support

[davideast]

Implemented session archival and filtering as described in Issue #78.

Changes:

1. Modified packages/core/src/types.ts to include archive() and unarchive() in SessionClient interface.
2. Modified packages/core/src/session.ts to implement archive() and unarchive(). These methods call the respective API endpoints and update the local storage cache to reflect the change immediately (Write-Through).
3. Modified packages/core/src/sessions.ts to add filter to ListSessionsOptions and pass it as a query parameter in SessionCursor.fetchPage.
4. Updated tests to verify the new functionality using MSW mocks.

Verification:

• Ran npm test tests/session.test.ts tests/sessions.test.ts in packages/core. All tests passed.
• Verified that API requests are constructed correctly with the expected URL and parameters.

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PR created automatically by Jules for task 17600129499379175013 started by @davideast

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