[Enhancement] Migrate code to jakarta namespaces

[lprimak]

Search before asking

• I had searched in the issues and found no similar issues.

Enhancement Request

Code needs to be migrated to Jakarta namespace, and remove shade plugin and BOM

Describe the solution you'd like

N/A

Are you willing to submit PR?

• Yes I am willing to submit a PR!

[nsoft]

I think this pushes spring to 6.x which pushes java baseline to 17

[fpapon]

Agreed, we want to make java 17 as baseline for Shiro 3.x

[nsoft]

Somehow I updated my fork but not my local main branch, so don't spend any time on the above... fixing