fix(cli): avoid building __typetests__ files (#27089)

# Why

During load-time benchmarking of individual files, I noticed we are
building `__typetests__` into the `build` directory of the cli. This
would then be included in the release itself.

See
https://cdn.jsdelivr.net/npm/@expo/cli@0.17.5/build/src/start/server/type-generation/__typetests__/

# How

- Exclude `**/__typetests__/**` when building with SWC

# Test Plan

Minor change, and testable through `npm pack`. Make sure `build` does
not include the `__typetests__` folder.

# Checklist

<!--
Please check the appropriate items below if they apply to your diff.
This is required for changes to Expo modules.
-->

- [x] Documentation is up to date to reflect these changes (eg:
https://docs.expo.dev and README.md).
- [ ] Conforms with the [Documentation Writing Style
Guide](https://github.com/expo/expo/blob/main/guides/Expo%20Documentation%20Writing%20Style%20Guide.md)
- [ ] This diff will work correctly for `npx expo prebuild` & EAS Build
(eg: updated a module plugin).

packages/@expo/cli/CHANGELOG.md

@@ -36,6 +36,7 @@
 - Update to remove `ExpoRequest/ExpoResponse` imports from `@expo/server`. ([#27261](https://github.com/expo/expo/pull/27261) by [@kitten](https://github.com/kitten))
 - Update the legacy inspector overrides to new device middleware API. ([#27425](https://github.com/expo/expo/pull/27425) by [@byCedric](https://github.com/byCedric))
 - Add new telemetry API to replace legacy analytics. ([#27787](https://github.com/expo/expo/pull/27787) by [@byCedric](https://github.com/byCedric))
+- Skip building and packing `__typetests__` files. ([#27089](https://github.com/expo/expo/pull/27089) by [@byCedric](https://github.com/byCedric))
 
 ### 📚 3rd party library updates
 

packages/@expo/cli/taskfile.js

@@ -11,7 +11,7 @@ export async function bin(task, opts) {
 export async function cli(task, opts) {
   await task
     .source('src/**/*.+(js|ts)', {
-      ignore: ['**/__tests__/**', '**/__mocks__/**'],
+      ignore: ['**/__tests__/**', '**/__mocks__/**', '**/__typetests__/**'],
     })
     .swc('cli', { dev: opts.dev })
     .target('build/src');