Feat: enable agent to use mTLS communication

[yungcero]

This pull request introduces a feature to the hashtopolis agent-python that allows the option for the agent to use mTLS verification in its session with the hashtopolis server. This is helpful if the hashtopolis server is configured to use mTLS for additional security.

By default it will be disabled unless someone has the need/use case to enable mTLS comms. The changes take advantage of the use of the requests.session class that is being used to handle client/server communication.

Also whitespace is stripped and single ticks '' have been changed to quotations "" due to my editor.