Make app path required

[mattjohnsonpint]

Description

• -storagePath has been replaced with -appPath and is now REQUIRED
  • The default path has been removed. That means we will no longer be running the runtime pointed at a common directory such as ~/.hypermode, but instead the runtime will be invoked for a specific Modus app. The -appPath should point at the build directory, or wherever the .wasm file will be found.
• Updated the VS Code launch settings, such that while debugging the Modus runtime, you can either enter a path to an app to run, or you can select one of the examples that's already in the repo.
  • For now, you still need to build the example independently, but the runtime will watch the build folder associated with the selected example.
• Renamed one of the examples to align the folder names across languages.

Checklist

• Code compiles correctly and linting passes locally
• Tests for new functionality and regression tests for bug fixes added
• Documentation added or updated
• Entry added to the CHANGELOG.md file describing and linking to this PR