EFI: Shared configuration

### Motivation

Like actions, we have multiple configuration in all projects, from a normal eslint setup to more advanced solutions. With our current way to implement it, it means that if we want to update and change a rule we need to update a lot of projects to be consistant.
By creating and having a package for all shared config (or multiple) we could leverage that to automatically update the configurations

### Expectation

Move all configurations in a repository that package the configuration

### Implementation

Create a package (or multiples) for reusable configuration
- eslint

### Status

Part: Technical
Status:
- create eslint package

### Draft

> All packages in the same organization should be following the same standards, it would make almost no sense to have the same configuration re-defined in each repository. By creating and exporting said configuration (for linting or other tools) this would allow us to enforce the same rules everywhere without risk.