[Bug]: support for VSCode virtual file systems is broken

[gbrueckl]

Version

1.6.3

Description

TMDL extensions is only working with local files (file:/) but not with VSCode virtual file systems (e.g. fabric:/).
This used to work in the past. This used to work with v1.5.x.
I tested this with Fabric Studio extensions which exposes TMDL files of online semantic models via a virtual file system which causes the following error:

Node.js v22.22.1
[Error - 9:49:43 AM] Server process exited with code 1.
[Info  - 9:49:43 AM] Connection to server got closed. Server will restart.
true
node:internal/url:1609
    throw new ERR_INVALID_URL_SCHEME('file');
          ^

TypeError [ERR_INVALID_URL_SCHEME]: The URL must be of scheme file
    at fileURLToPath (node:internal/url:1609:11)
    at c:\Users\GerhardBrueckl\.vscode\extensions\analysis-services.tmdl-1.6.3\dist\server.js:188960:70
    at CallbackList.invoke (c:\Users\GerhardBrueckl\.vscode\extensions\analysis-services.tmdl-1.6.3\dist\server.js:6341:36)
    at _Emitter.fire (c:\Users\GerhardBrueckl\.vscode\extensions\analysis-services.tmdl-1.6.3\dist\server.js:6400:34)
    at c:\Users\GerhardBrueckl\.vscode\extensions\analysis-services.tmdl-1.6.3\dist\server.js:12799:36
    at handleNotification (c:\Users\GerhardBrueckl\.vscode\extensions\analysis-services.tmdl-1.6.3\dist\server.js:7681:17)
    at handleMessage (c:\Users\GerhardBrueckl\.vscode\extensions\analysis-services.tmdl-1.6.3\dist\server.js:7425:11)
    at processMessageQueue (c:\Users\GerhardBrueckl\.vscode\extensions\analysis-services.tmdl-1.6.3\dist\server.js:7442:13)
    at Immediate.<anonymous> (c:\Users\GerhardBrueckl\.vscode\extensions\analysis-services.tmdl-1.6.3\dist\server.js:7418:11)
    at process.processImmediate (node:internal/timers:484:21) {
  code: 'ERR_INVALID_URL_SCHEME'
}

Node.js v22.22.1
[Error - 9:49:43 AM] Server process exited with code 1.
[Error - 9:49:43 AM] The Tabular Model Definition Language (TMDL) Extension server crashed 5 times in the last 3 minutes. The server will not be restarted. See the output for more information.

Steps to Reproduce

1. Install Fabric Studio (https://marketplace.visualstudio.com/items?itemName=GerhardBrueckl.fabricstudio)
2. Connect to your Fabric tenant
3. Use the workspace browser to navigate to a semantic model
4. expand Definition
5. open any .tmdl file within the definition

Expected Behavior

It should work the same way as it does for local files

Actual Behavior

The Tabular Model Definition Language (TMDL) Extension server crashed

Additional Context

I am the author of Fabric Studio - happy to get in touch and solve this together