Move enable language in cmakelist.txt to avoid configure warning

[mcbarton]

Description

Please include a summary of changes, motivation and context for this PR.

Currently we get a warning when configuring CppInterOp that we should define the project before using enable language. This PR should fix this issue. See here for the warning this PR should remove https://github.com/compiler-research/CppInterOp/actions/runs/12732612570/job/35488024303#step:10:76

Fixes # (issue)

Type of change

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• Bug fix
• New feature
• Requires documentation updates

Testing

Please describe the test(s) that you added and ran to verify your changes.

Checklist

• I have read the contribution guide recently

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 70.96%. Comparing base (4b4fbe0) to head (5b4d7a2).
Report is 2 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #439   +/-   ##
=======================================
  Coverage   70.96%   70.96%           
=======================================
  Files           9        9           
  Lines        3541     3541           
=======================================
  Hits         2513     2513           
  Misses       1028     1028           

[vgvassilev]

LGTM!