A new **Launch** debug configuration that shows a selector to the user
to choose among any of the `*.tscn` files in the workspace to use as the
entrypoint instead of using the project's
main scene.
Tries to find the Godot executable to set it in the generated
`tasks.json` and `launch.json` files automatically for the user.
The user can specify a custom path in the configuration to use
as the Godot executable path, since it's unlikely we'll find it
otherwise.
Separates the extension.ts code in multiple files and adds an asset
generator code to provide the `tasks.json` and `launch.json` files (can
be triggered manually with a command).
- The build task generated uses the Godot CLI to build the solution (as
described in #18), I think this is the cleanest solution since we let
Godot handle the building of the project, but the user must configure
the path to the Godot executable.
- The Launch debug configuration is now created with the build
`preLaunchTask` automatically so users won't have to set it up manually
(fixes#18).
- Adds snippets to `tasks.json` to add debug configuration easily
after the file has been created.
- Adds a command to generate the `tasks.json` and `launch.json` manually
for convenience (asks the user if they want to override their current
configuration first).
