## What does this PR do?
- Adds AB tests middleware that redirects users to the app-dir pages with probability that is defined by env var
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Fixes # (issue)
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## Requirement/Documentation
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This PR requires new env variables:
`APP_ROUTER_EVENT_TYPES_ENABLED` - boolean that defines if app dir event-types page redirect is enabled
`AB_TEST_BUCKET_PROBABILITY` - number [0, 100] that defines the percentage of users getting redirected to the app dir pages
## Type of change
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- [ ] Bug fix (non-breaking change which fixes an issue)
- [x] Chore (refactoring code, technical debt, workflow improvements)
- [ ] New feature (non-breaking change which adds functionality)
- [ ] Breaking change (fix or feature that would cause existing functionality to not work as expected)
- [ ] This change requires a documentation update
## How should this be tested?
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Does not requires testing, implements middleware as a dead code
## Mandatory Tasks
- [x] Make sure you have self-reviewed the code. A decent size PR without self-review might be rejected.
* chore: Reduce API serverless memory configuration
* Only limit to slots for now
* Moved the vercel.json file to root
* More fun with vercel.json files
* Trying new pattern
* Using a pattern that matches the Vercel deployment summary function name
* Trying to set the memory directly in the handler file
* Trying it on all functions
* Changed glob
* Moved vercel.json file to root
* Trying a new glob
* Give me all functions
* Trying just * for all functions
* Trying again...
* Putting the config on the defaultResponder
* Seeing if web app takes setings
* Changed .js to .ts
* Changed root path
* Added back vercel.json now that the path is changed
* Reduced API slots memory to 512
* Removed unneeded code changes'
* Update defaultResponder.ts