Debugger: Add SVD Peripherals and prep for multi-core

[noppej]

This PR is part of a trio of PR's that depend on each other:

• Debugger in probe-rs
  • Part I of preparing for multi-core support. This will require future PR's to complete.
  • Restructured source files - large files broken up into smaller units.
  • Support for loading CMSIS-SVD files and making peripheral values available to the VSCode extension.
• VSCode extension
  • A draft version of the extension probe-rs-debugger-0.4.0.vsix is available to facilitate testing of these PR's.
  • Changes to launch.json configuration to support SVD Peripheral files and core specific configuration.
  • Updated various development dependencies.
  • Updated the Debug Adapter Protocol to version 1.55.1.
• Documentation on probe.rs
  • Document changes to VSCode launch.json.
  • GIF to demonstrate how to navigate and monitor SVD Peripheral register values.

[bors[bot]]

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