feat(vscode): Add run button

[spotandjake]

This pr adds a run current file button with a corresponding configuration and command.

It currently uses the runCommandLayout configuration to build a pattern and then opens the terminal with the run command when pressed.

Closes: #167

[ospencer]

I feel like if we add this it needs to be configurable in some way. There's a lot of cases where it's handy to just run a file (especially for tests), but if you're targeting anything other than the command line this button will just result in an error.

I'm not super against just merging it as-is, but curious to what your thoughts are.

[spotandjake]

In general I 100% agree with you however I think that is probably in the scope of silo and something that will be configured in your silo.toml file once it exists, for now I just made the run button open the default run command in your terminal, the user can edit it if they want and just press enter to run the program. Letting silo handle this will also make it less editor specific reducing work when supporting us editors.

[ospencer]

Sure. I do think though that the run button should just run the code, it shouldn't give me a command.