feat: Add Aerospike Persister

[PatersonProjects]

Adds Aerospike as an available synchronous persister to Burr, implementing BaseStatePersister with save, load, and list_app_ids functionality.

Changes

• New AerospikeBasePersister implementing Burr's BaseStatePersister.
• Adds [aerospike] optional dependency: aerospike>=19.0.0; python_version >= "3.10".
• Adds apache-burr[aerospike] to tests and documentation extras.
• Adds variation on chatbot example with Aerospike backed persistence

How I tested this

• Tested through unit and integration tests found in tests/integrations/persisters/test_b_aerospike.py
• Also conducted end-to-end manual testing using chatbot example

Checklist

• PR has an informative and human-readable title (this will be pulled into the release notes)
• Changes are limited to a single goal (no scope creep)
• Code passed the pre-commit check & code is left cleaner/nicer than when first encountered.
• Any change in functionality is tested
• New functions are documented (with a description, list of inputs, and expected output)
• Placeholder code is flagged / future TODOs are captured in comments
• Project documentation has been updated if adding/changing functionality.