Migrate /u Slack command
The D7 webhook for the `/u username or email` Slack functionality needs to be recreated in Quarkus. While it should be simple to implement this using the current tools available to us through Quarkus, it may be worth leveraging the [Slack Java SDK](https://slack.dev/java-slack-sdk/). More investigation is needed.
## Requirements
This webhook can only allow requests using a valid token and team domain. Otherwise returning `403 Forbidden`.
### All fields to display
- Required
- Eca status
- Name
- Mail
- Committer
- If they are present
- GH handle
- twitter handle
- job title
- website
- country name
- bio
- interests
### Example returns
#### On failure
An Eclipse account was not found with _value_
#### On success
Ex: /u zacharysabourin
An Eclipse account was found with **zacharysabourin** https://accounts.eclipse.org/user/606609.
>[Zachary Sabourin (Eclipse Foundation)](https://accounts.eclipse.org/user/606609)
>
>ECA Status: Valid
>
>Name: zacharysabourin
>
>Mail: email
>
>Committer: No
>
>Github handle: https://github.com/zacharysabourin
>
>Job title: Web Developer
>
>Bio: I'm fascinated by the power of technology and I'm always trying to learn new things! When I'm not working or learning, I enjoy exploring >my many interests or going on walks.
>"Be yourself; everyone else is already taken" -Oscar Wilde
>
>Interests: Video games, bass guitar, Music, Magic: the Gathering, PodCasts
>
>Friend ID: Not found
issue