Added a default usage tarket to the makefile

[igaray]

Added a defaulta usage target to the makefile so anyone just running make will get a useful error message.

[github-actions]

Benchmarking factorial

Running 5000000 iterations
Using input value: 20
Concrete Result = 2432902008176640000 Time taken : 59.20 ms
Rust Result = 2432902008176640000 Time taken : 60.25 ms

Benchmarking fib

Running 5000 iterations
Using input value: 20
Concrete Result = 6765 Time taken : 136.00 ms
Rust Result = 6765 Time taken : 85.32 ms

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 64.29%. Comparing base (8732110) to head (2b6808d).

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #100   +/-   ##
=======================================
  Coverage   64.29%   64.29%           
=======================================
  Files          33       33           
  Lines        3355     3355           
=======================================
  Hits         2157     2157           
  Misses       1198     1198           

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.