Unify ProseMirror descriptions and fix item sheet layout.

Various ItemV2 fixes.

Weapon sheet reorg to smooth out style inconsistencies.

module/data/fields/html-content-field.js

@@ -0,0 +1,15 @@
+const { HTMLField } = foundry.data.fields;
+
+/**
+ * Standard Delta Green HTML / ProseMirror field defaults.
+ * @param {Partial<foundry.data.fields.StringFieldOptions>} [options]
+ * @returns {foundry.data.fields.HTMLField}
+ */
+export default function DGHTMLField(options = {}) {
+  return new HTMLField({
+    required: false,
+    blank: true,
+    initial: "",
+    ...options,
+  });
+}