feat(core): improve in-memory validation, FatturaPA detection coverage, and published type compatibility

test/strict-consumer/index.ts

@@ -0,0 +1,16 @@
+import { EInvoice } from '../../dist_ts/index.js';
+import * as plugins from '../../dist_ts/plugins.js';
+
+const invoice = new EInvoice();
+invoice.pdf = undefined;
+invoice.pdfAttachments = undefined;
+
+const parser = new plugins.DOMParser();
+const parserFromNamespace = new plugins.xmldom.DOMParser();
+
+void invoice;
+void parser;
+void parserFromNamespace;
+void plugins.pako.inflate;
+void plugins.SaxonJS.compile;
+void plugins.SaxonJS.transform;

test/strict-consumer/tsconfig.json

@@ -0,0 +1,15 @@
+{
+  "compilerOptions": {
+    "target": "ES2022",
+    "module": "NodeNext",
+    "moduleResolution": "NodeNext",
+    "strict": true,
+    "verbatimModuleSyntax": true,
+    "skipLibCheck": false,
+    "noEmit": true,
+    "types": ["node"]
+  },
+  "include": [
+    "./index.ts"
+  ]
+}