Add initialization flow

[ddoktorski]

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[ddoktorski]

This change is part of the following stack:

• Remove main.rs #25
  • Add client connection handling via I/O threads #27
    • Move debugger to separate module #28
      • Make handle_request method of debugger #29
        • Add initialization flow #30 ◀
          • Integrate debugger with VM #31
            • Support pause and continue requests #32
              • Add debugger state #38
                • Separate request handling and client communication #39

_{Change managed by git-spice.}