511 Fix URI issues to ensure Windows compatibility

Ensure Windows paths are correctly parsed as URIs
Use cross-env to set environment variables in npm scripts
Ensure workflow-dsl server jar is started in background on Windows
Quick-Fix: ensure model loading works with windows paths for model analysis and Java/cpp code generators.

511 Fix connection to embedded WorkflowAnalyzerServer instance

Remove failing connection creation via 'vscode-ws-jsonrpc/server' and create connection via 'vscode-jsonrpc/node' instead