Make 'immer' library (and 'use-immer') available

Immer makes immutable data structures easier to work with.

- https://immerjs.github.io/immer/

Useful because there are places in React and React Query where you need
to create a copy of an immutable object with some changes, and Immer
can be much easier to write and read than the equivalent spread syntax.

- updating state from useState, or using reducers (React)
  https://react.dev/learn/updating-objects-in-state#write-concise-update-logic-with-immer
  https://react.dev/learn/updating-arrays-in-state#write-concise-update-logic-with-immer
  https://react.dev/learn/extracting-state-logic-into-a-reducer#writing-concise-reducers-with-immer

- updating a state cache after mutation to avoid re-fetching, or to
  show optimistic updates (React Query)
  https://tanstack.com/query/latest/docs/framework/react/guides/updates-from-mutation-responses#immutability
  https://tanstack.com/query/latest/docs/framework/react/guides/optimistic-updates#via-the-cache

Author: p2edwards

package-lock.json

@@ -18,6 +18,7 @@
     "chai-deep-equal-ignore-undefined": "^1.1.1",
     "classnames": "^2.3.1",
     "fuse.js": "^6.4.3",
+    "immer": "^10.1.1",
     "immutable": "^3.8.2",
     "jquery": "^3.5.1",
     "jquery-ui": "1.12.1",
@@ -69,6 +70,7 @@
     "reflux-core": "^1.0.0",
     "select2": "3.5.2-browserify",
     "spark-md5": "^3.0.2",
+    "use-immer": "^0.10.0",
     "wretch": "^2.9.0",
     "zxcvbn": "^4.4.2"
   },