This pull request modernizes how device classes interact with timing buffers and refactors the use of the LazyPV class. The main improvements are the adoption of the new Buffer interface from slac_timing, the use of LazyPV from slac_tools instead of a local implementation, and updates to dependencies to support these changes.

Buffer interface modernization:

• All device classes (bpm.py, lblm.py, pmt.py, wire.py) now use the new Buffer interface from slac_timing for timing data retrieval, replacing previous custom buffer logic and error handling. This results in cleaner and more consistent buffer access methods.

Refactoring and dependency updates:

• The local LazyPV implementation in device.py is removed in favor of importing LazyPV from the new slac_tools dependency, simplifying code maintenance and ensuring consistency across projects.
• The pyproject.toml dependencies are updated to include both slac-tools and slac-timing, enabling the use of the new interfaces and utilities.

Test updates:

• The patch target for mocking the PV class in test_wire.py is updated to reflect the move to slac_tools, ensuring tests continue to mock the correct class.