Support templates in structName

[bernhardmgruber]

E.g.: llama::structName(std::string{}) == "basic_string<char,char_traits<char>,allocator<char>>".

[codecov]

Codecov Report

Merging #449 (ad9219e) into develop (06c7f42) will increase coverage by 0.00%.
The diff coverage is 100.00%.

@@           Coverage Diff            @@
##           develop     #449   +/-   ##
========================================
  Coverage    99.21%   99.21%           
========================================
  Files           58       58           
  Lines         5198     5218   +20     
========================================
+ Hits          5157     5177   +20     
  Misses          41       41           

Impacted Files	Coverage Δ
include/llama/Core.hpp	94.59% <100.00%> (+2.00%)	⬆️
tests/core.cpp	100.00% <100.00%> (ø)

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 06c7f42...ad9219e. Read the comment docs.