Started textnodes, renamed tool with wrong name, started field configuration system

source/data/field-configuration.mjs

@@ -0,0 +1,24 @@
+import { Invalid_Data } from '@efforting.tech/errors';
+
+export class Field_Configuration {
+	constructor(name, validator=null, expected=undefined) {
+		Object.assign(this, { name, validator, expected });
+	}
+
+	check_validation(value) {
+		const { validator } = this;
+
+		return !validator || validator(value);
+	}
+
+	validate(value, target=undefined) {
+		const { validator, name, expected } = this;
+		if (!this.check_validation(value)) {
+			throw new Invalid_Data({
+				name, validator, value,
+				target, expected,
+			});
+		}
+	}
+
+}