Add Extension setting for additional compiler arguments

[ZeWaka]

Adds a setting so people can specify --suppress-unimplemented and other compiler arguments while using the debugger.

Works great:

[SpaceManiac]

Thoughts on how this compares to other possible storage locations?

• Stored as part of the build task configuration
• Stored as part of the project rather than VSC-specific

[ZeWaka]

Thoughts on how this compares to other possible storage locations?

My main thinking with this is that this is how Rust Analyzer does it, and it's probably the simplest method. With how VSC uses the settings, this can be set for the workspace/folder as well, which could be used to specify flags codebases want to use in the future if we don't create a config file of sorts.

[amylizzle]

bump