fix: update document flow fetch logic (#1039)

## Description

**Fixes issues with mismatching state between document steps.**

For example, editing a recipient and proceeding to the next step may not
display the updated recipient. And going back will display the old
recipient instead of the updated values.

**This PR also improves mutation and query speeds by adding logic to
bypass query invalidation.**

```ts
export const trpc = createTRPCReact<AppRouter>({
  unstable_overrides: {
    useMutation: {
      async onSuccess(opts) {
        await opts.originalFn();

        // This forces mutations to wait for all the queries on the page to reload, and in
        // this case one of the queries is `searchDocument` for the command overlay, which
        // on average takes ~500ms. This means that every single mutation must wait for this.
        await opts.queryClient.invalidateQueries(); 
      },
    },
  },
});
```

I've added workarounds to allow us to bypass things such as batching and
invalidating queries. But I think we should instead remove this and
update all the mutations where a query is required for a more optimised
system.

## Example benchmarks

Using stg-app vs this preview there's an average 50% speed increase
across mutations.

**Set signer step:**
Average old speed: ~1100ms
Average new speed: ~550ms

**Set recipient step:**
Average old speed: ~1200ms
Average new speed: ~600ms

**Set fields step:**
Average old speed: ~1200ms
Average new speed: ~600ms

## Related Issue

This will resolve #470

## Changes Made

- Added ability to skip batch queries
- Added a state to store the required document data.
- Refetch the data between steps if/when required
- Optimise mutations and queries

## Checklist

- [X] I have tested these changes locally and they work as expected.
- [X] I have followed the project's coding style guidelines.

---------

Co-authored-by: Lucas Smith <me@lucasjamessmith.me>

packages/trpc/client/index.ts

@@ -1,16 +1,22 @@
-import { createTRPCProxyClient, httpBatchLink } from '@trpc/client';
+import { createTRPCProxyClient, httpBatchLink, httpLink, splitLink } from '@trpc/client';
 import SuperJSON from 'superjson';
 
 import { getBaseUrl } from '@documenso/lib/universal/get-base-url';
 
-import { AppRouter } from '../server/router';
+import type { AppRouter } from '../server/router';
 
 export const trpc = createTRPCProxyClient<AppRouter>({
   transformer: SuperJSON,
 
   links: [
-    httpBatchLink({
-      url: `${getBaseUrl()}/api/trpc`,
+    splitLink({
+      condition: (op) => op.context.skipBatch === true,
+      true: httpLink({
+        url: `${getBaseUrl()}/api/trpc`,
+      }),
+      false: httpBatchLink({
+        url: `${getBaseUrl()}/api/trpc`,
+      }),
     }),
   ],
 });