[cli][packages] unify the default dev server port to 8081 (#22880)

# Why

for historical reasons, when running `npx expo start` the dev-server listens to port 19000, and running `npx expo start --

[cli][packages] unify the default dev server port to 8081 (#22880)

# Why

for historical reasons, when running `npx expo start` the dev-server listens to port 19000, and running `npx expo start --dev-client` it listens to port 8081. since we are now on our effort to deprecate `--dev-client` option, it is better to unify the listening port.
close ENG-8936

# How

- update packages/**/*.ts for port 19000 -> 8081
- search more occurrences for 19000 to 8081

# Test Plan

- ci passed
- bare-expo
- unversioned expo go + ncl

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feat(cli): add touch middleware and app entry (#19231)

* add middleware for creating files

* fix touch request

* added support for auto entry

* added tests for touch middleware

* added r

feat(cli): add touch middleware and app entry (#19231)

* add middleware for creating files

* fix touch request

* added support for auto entry

* added tests for touch middleware

* added router tests

* Update CHANGELOG.md

* Update packages/@expo/cli/CHANGELOG.md

Co-authored-by: Expo Bot <[email protected]>

* Update instantiateMetro.ts

Co-authored-by: Expo Bot <[email protected]>

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