Add friendly message for when getTsConfig fails

[egasimus]

When tsconfig.json is missing, the following errors is thrown:

 ⋯   Compiling TypeScript...
node:internal/process/esm_loader:34
      internalBinding('errors').triggerUncaughtException(
                                ^
TypeError [Error]: Cannot read properties of null (reading 'path')
    at load (file:///.../node_modules/@ganesha/esbuild/loader.mjs:56:54)
    at async nextLoad (node:internal/modules/esm/hooks:750:22)
    at async Hooks.load (node:internal/modules/esm/hooks:383:20)
    at async MessagePort.handleMessage (node:internal/modules/esm/worker:199:18)

Either:

• Tell the user to create a tsconfig
• Ignore the error and compile with default settings