EFI: Publish and maintain types

### Motivation

Types are widely used in the ecosystem, and requested as shown in the Next-10 survey last year. By providing them directly (or helping the community to provide them) would be a good help for the community. But this can be time consuming and not be perfect with versionning (based on typescript)

### Expectation

Evaluate if we want to provide more type documentation using TS or JSDoc (or other solution)

### Implementation

### Status

Part: Technical

### Draft

> Types of the Express ecosystem are “at best” available and working. But they can be greatly improved. By automatically building and publishing types when we release a new version it would greatly help users. The community at scale rely more and more on typing (or the equivalent using JSDoc) and we should work to publish them automatically.
Add types inside package
Publish dedicated package