Refactor Directus Extensions

[Jan0707]

We have two recent learnings that we would like to see applied to all of our existing Directus extensions (mostly hooks)

• Re-use the database connection from the event itself instead of creating a new one. As can be seen here:

  website/directus-cms/extensions/directus-extension-programmierbar-bundle/src/create-profile/index.ts

  Line 26 in f60735a

  // Note that we manually set the knex/database connection here.

  According to the directus team, this approach can be used at all times.
• Refactor our handler function to use the proper type. This makes type hinting for all method arguments available as well as allows us to easily specify the payload. As can be seen here:

  website/directus-cms/extensions/directus-extension-programmierbar-bundle/src/create-profile/index.ts

  Line 17 in f60735a

  const handler: FilterHandler<UserPayloadType> = async function(payload, _metadata, context): Promise<UserPayloadType> {