docs(example): update readme with build step (#6089)

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## Summary

I had trouble running the Example app after following the README steps.
After building from the root of the monorepo, the iOS app began working
so I updated the documentation steps.

## Test plan

1. Clone the `react-native-reanimated` repository
2. Follow step exactly in `Example/README.md` and observe the iOS app
will not start
3. Go back to the root of the monorepo and run `yarn build`
4. `cd Example && yarn ios` should now work successfully

---------

Co-authored-by: Tomek Zawadzki <[email protected]>

apps/paper-example/README.md

@@ -13,21 +13,27 @@ cd react-native-reanimated
 yarn
 ```
 
-3. Install node_modules in `Example/` directory:
+3. Build the library
+
+```
+yarn build
+```
+
+4. Install node_modules in `Example/` directory:
 
 ```
 cd Example
 yarn
 ```
 
-4. Install Pods in `Example/ios/` directory:
+5. Install Pods in `Example/ios/` directory:
 
 ```
 cd ios
 pod install
 ```
 
-5. Start Metro bundler in `Example/` directory
+6. Start Metro bundler in `Example/` directory
 
 ```
 cd ..

packages/react-native-reanimated/cspell.json

@@ -5,7 +5,7 @@
     "animable",
     "animatable",
     "appcompat",
-    "barfoo",
+    "automagically",
     "barfoo",
     "bfrg",
     "bokeh",
@@ -14,21 +14,24 @@
     "coef",
     "collapsable",
     "devs",
-    "devs",
     "easings",
     "inout",
     "ispreview",
     "layoutable",
     "lightspeed",
+    "nomalized",
+    "overdamped",
     "pressable",
     "RCTUI",
     "REAUI",
     "relayout",
+    "runtimes",
     "snapshotting",
     "springify",
     "superview",
     "swmansion",
     "systrace",
+    "threejs",
     "typecheck",
     "uimanager",
     "uimodule",
@@ -40,6 +43,7 @@
     "workletized",
     "workletizes",
     "worklets",
+    "xcworkspace"
     "runtimes",
     "overdamped",
     "automagically",