fix(ci): disable .NET workflow until project is initialized

The .NET CI workflow is temporarily set to manual trigger only
to prevent failures on PRs before the .NET project exists.

Will be re-enabled automatically when Issue #25 (Initialize .NET
10 solution) is completed.

Author: Sstark97

.github/workflows/net-ci.yml

@@ -1,16 +1,20 @@
 name: .NET CI
 
+# Temporarily disabled until .NET project is initialized (Issue #25)
+# Will be enabled automatically once net/ directory contains .NET project files
 on:
-  push:
-    branches: [ main ]
-    paths:
-      - 'net/**'
-      - '.github/workflows/net-ci.yml'
-  pull_request:
-    branches: [ main ]
-    paths:
-      - 'net/**'
-      - '.github/workflows/net-ci.yml'
+  workflow_dispatch:  # Manual trigger only for now
+  # Uncomment when .NET project is ready:
+  # push:
+  #   branches: [ main ]
+  #   paths:
+  #     - 'net/**'
+  #     - '.github/workflows/net-ci.yml'
+  # pull_request:
+  #   branches: [ main ]
+  #   paths:
+  #     - 'net/**'
+  #     - '.github/workflows/net-ci.yml'
 
 defaults:
   run: