distribute: fix $schema aka.ms URL + add NSIS Silent switches

Two errors from PR #391813 manifest validation (build 349844):

1. 'The schema header URL does not match the expected pattern.'
   I used raw.githubusercontent.com URLs, but the validator wants
   the aka.ms short URLs that the official winget-bot uses.
   Updated all 3 files to https://aka.ms/winget-manifest.*.1.12.0.schema.json

2. 'Silent and SilentWithProgress switches are not specified for
   InstallerType exe.'
   TrianglesQt installer is built with NSIS (see build-all.yml
   'Install NSIS via MSYS2' step + mingw-w64-x86_64-nsis package).
   NSIS silent flag is /S. Added both Silent and SilentWithProgress.

Closes superseded PR microsoft/winget-pkgs#391813 (same Manifest-Validation-Error).

.github/workflows/distribute.yml

@@ -540,6 +540,10 @@ jobs:
           # then publisher folder (PascalCase), then short package folder name.
           # Example: manifests/c/CryptographicTriangles/TrianglesQt/5.9.20/
           MANIFEST_DIR="manifests/$PUBLISHER_INITIAL/CryptographicTriangles/$PACKAGE_SHORT/$VERSION"
+
+          # TrianglesQt is built with NSIS (Nullsoft). Standard silent flag is /S.
+          # If the installer tech ever changes, update InstallerSwitches here.
+          NSIS_SILENT="/S"
           
           # 1. Clone the winget-pkgs repo (Sami's fork) — auto-create fork if needed
           echo "Forking microsoft/winget-pkgs..."
@@ -575,7 +579,7 @@ jobs:
           SCHEMA_BASE="https://raw.githubusercontent.com/microsoft/winget-cli/master/schemas/JSON/manifests/v1.12.0"
 
           cat > "$MANIFEST_DIR/${PACKAGE_ID}.yaml" <<EOF
-          # yaml-language-server: \$schema=${SCHEMA_BASE}/manifest.version.1.12.0.json
+          # yaml-language-server: \$schema=https://aka.ms/winget-manifest.version.1.12.0.schema.json
           PackageIdentifier: ${PACKAGE_ID}
           PackageVersion: ${VERSION}
           DefaultLocale: en-US
@@ -584,7 +588,7 @@ jobs:
           EOF
 
           cat > "$MANIFEST_DIR/${PACKAGE_ID}.locale.en-US.yaml" <<EOF
-          # yaml-language-server: \$schema=${SCHEMA_BASE}/manifest.defaultLocale.1.12.0.json
+          # yaml-language-server: \$schema=https://aka.ms/winget-manifest.defaultLocale.1.12.0.schema.json
           PackageIdentifier: ${PACKAGE_ID}
           PackageVersion: ${VERSION}
           PackageLocale: en-US
@@ -604,12 +608,15 @@ jobs:
           EOF
 
           cat > "$MANIFEST_DIR/${PACKAGE_ID}.installer.yaml" <<EOF
-          # yaml-language-server: \$schema=${SCHEMA_BASE}/manifest.installer.1.12.0.json
+          # yaml-language-server: \$schema=https://aka.ms/winget-manifest.installer.1.12.0.schema.json
           PackageIdentifier: ${PACKAGE_ID}
           PackageVersion: ${VERSION}
           InstallModes:
             - interactive
             - silent
+          InstallerSwitches:
+            Silent: /S
+            SilentWithProgress: /S
           Installers:
             - Architecture: x64
               InstallerType: exe