feat(invoice-ninja): add create client action

packages/backend/src/apps/invoice-ninja/common/filter-provided-fields.ts

@@ -0,0 +1,18 @@
+import isObject from 'lodash/isObject';
+
+export function filterProvidedFields(body: Record<string, unknown>) {
+  return Object.keys(body).reduce<Record<string, unknown>>((result, key) => {
+    const value = body[key];
+    if (isObject(value)) {
+      const filteredNestedObj = filterProvidedFields(
+        value as Record<string, unknown>
+      );
+      if (Object.keys(filteredNestedObj).length > 0) {
+        result[key] = filteredNestedObj;
+      }
+    } else if (body[key]) {
+      result[key] = value;
+    }
+    return result;
+  }, {});
+}