Migrate the mailing list API endpoint to Quarkus

Similar to eclipsefdn-downloads-api#1 (closed), we decided to move some existing APIs to Quarkus.

The mailing list endpoint is defined here: https://api.eclipse.org/#tag/Mailing-Lists

• Retrieve metadata for all the mailing lists https://api.eclipse.org/#operation/FetchMailingLists
• Retrieve information for a specific mailing list https://api.eclipse.org/#operation/RetrieveMailingList

added MBO label

assigned to @malowe

added to epic eclipsefdn&15 (closed)

added statewip label

marked this issue as related to #2 (closed)

added statetodo label and removed statewip label

added statewip label and removed statetodo label

added statereview label and removed statewip label

added statedone label and removed statereview label

closed