👷 Run CI only when necessary

[marcelwa]

This PR adapts the CI workflows such that they are only run when files have changed which could affect their outcome. Thereby, less time should be spent running redundant CIs.

[github-actions]

clang-tidy review says "All clean, LGTM! 👍"

[codecov]

Codecov Report

Merging #73 (9a7adff) into main (7d3d814) will increase coverage by 0.00%.
The diff coverage is 92.97%.

Additional details and impacted files

@@           Coverage Diff           @@
##             main      #73   +/-   ##
=======================================
  Coverage   93.08%   93.09%           
=======================================
  Files          45       45           
  Lines        5163     5184   +21     
=======================================
+ Hits         4806     4826   +20     
- Misses        357      358    +1     

Impacted Files	Coverage Δ
include/fiction/io/tt_reader.hpp	94.44% <ø> (ø)
include/fiction/io/write_qca_layout.hpp	83.88% <0.00%> (ø)
include/fiction/layouts/bounding_box.hpp	100.00% <ø> (ø)
include/fiction/layouts/cartesian_layout.hpp	97.75% <ø> (ø)
include/fiction/layouts/hexagonal_layout.hpp	98.50% <ø> (ø)
include/fiction/technology/cell_technologies.hpp	100.00% <ø> (ø)
include/fiction/utils/range.hpp	100.00% <ø> (ø)
include/fiction/io/network_reader.hpp	65.21% <55.55%> (ø)
include/fiction/utils/placement_utils.hpp	85.05% <66.66%> (ø)
include/fiction/technology/qca_one_library.hpp	88.52% <75.00%> (ø)
... and 31 more

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[github-actions]

clang-tidy review says "All clean, LGTM! 👍"

[github-actions]

clang-tidy review says "All clean, LGTM! 👍"

[github-actions]

clang-tidy review says "All clean, LGTM! 👍"