Add REST Scala 3.1 tutorial

[korcena]

Motivation:

Added Scala 3.1 tutorial for Armeria

Modifications:

• Added /site/src/pages/tutorials/rest-scala/README.mdx

[CLAassistant]

Thank you for your submission! We really appreciate it. Like many open source projects, we ask that you sign our Contributor License Agreement before we can accept your contribution.
_{You have signed the CLA already but the status is still pending? Let us recheck it.}

[trustin]

Thanks a lot for your contribution, @korcena 🙇

It's likely that we'll work with our internal technical writer to evolve this into a more well-formed tutorial. Meanwhile, could you please sign the ICLA following this link?

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 73.23%. Comparing base (829992a) to head (e3ca954). Report is 1100 commits behind head on main.

Additional details and impacted files

@@             Coverage Diff              @@
##               main    #4110      +/-   ##
============================================
+ Coverage     73.18%   73.23%   +0.04%     
- Complexity    16126    16135       +9     
============================================
  Files          1405     1405              
  Lines         61669    61669              
  Branches       7765     7765              
============================================
+ Hits          45134    45164      +30     
+ Misses        12612    12583      -29     
+ Partials       3923     3922       -1     

:umbrella: View full report in Codecov by Sentry.
:loudspeaker: Have feedback on the report? Share it here.

[korcena]

Thanks a lot for your contribution, @korcena bow

It's likely that we'll work with our internal technical writer to evolve this into a more well-formed tutorial. Meanwhile, could you please sign the ICLA following this link?

Hi @trustin! Glad to help. I have signed the ICLA.