chose to export "presentation_detail" field instead of "presentation_detail" to solve max character limitation.

feat(export-structures): "/formated" endpoint now returns an array of structures matching state format

Type also changed from boolean to string

Still remove an existing cnfsId when no meeting opened. 
No more 429 risks since it works now with one call to https://api.conseiller-numerique.gouv.fr/permanences.

Updating Nest to full v9
Updating Elasticsearch to v8
Updating mongoose to v6
Updating Axios to v1

BREAKING CHANGE: mongoose and axios updates.