added schema support on build

docs/scripts/json-schema.js

@@ -0,0 +1,14 @@
+const fs = require('fs');
+const path = require('path');
+
+const pkgJson = require('../../package.json');
+
+if (pkgJson?.contributes?.configuration) {
+    const schema = {
+        "$schema": "https://json-schema.org/draft/2020-12/schema",
+        "$id": "https://frontmatter.codes/frontmatter.schema.json",
+        ...pkgJson.contributes.configuration
+    }
+
+    fs.writeFileSync(path.join(path.resolve('.'), '/public/frontmatter.schema.json'), JSON.stringify(schema, null, 2));
+}