Make 'wretch' library available

Proactively installing so it's available across collab workflow.

Wretch is a chainable, configurable `fetch` API wrapper.

- https://github.com/elbywan/wretch

Useful because:

- Throws errors by default, which is useful for React Query functions *
- Convenient chainable API - **succinct**
- Well-typed
- Small size
- Can cover our use cases in fetchWrapper and jQuery

*: https://tanstack.com/query/latest/docs/framework/react/guides/query-functions#usage-with-fetch-and-other-clients-that-do-not-throw-by-default

Author: p2edwards

package-lock.json

@@ -69,6 +69,7 @@
     "reflux-core": "^1.0.0",
     "select2": "3.5.2-browserify",
     "spark-md5": "^3.0.2",
+    "wretch": "^2.9.0",
     "zxcvbn": "^4.4.2"
   },
   "devDependencies": {