Added custom sign code

WindowsSigner.js

@@ -0,0 +1,31 @@
+const { execSync } = require('child_process');
+
+
+/**
+ * Custom signing utility
+ * Required environment variables:
+ *      KEYPAIR_ALIAS - KSP keypair from digicert
+ * @param config
+ * @returns {Promise<void>}
+ */
+
+
+// eslint-disable-next-line require-await
+exports.default = async (config) => {
+    const keypairAlias = process.env.KEYPAIR_ALIAS;
+    const path = config.path ? String(config.path) : '';
+
+    if (process.platform !== 'win32' || !keypairAlias || !path) {
+        throw new Error('Either win32, no keypair or path not found');
+    }
+
+    const output = execSync(
+        `smctl sign --keypair-alias=${keypairAlias} --input="${path}" --verbose`,
+    )
+        .toString()
+        .trim();
+
+    if (!output.includes('Done Adding Additional Store')) {
+        throw new Error(`Failed to sign executable: ${output}`);
+    }
+};