[Core] Log warning when classes could not be loaded

[mpkorstanje]

Fixes: #2212, #2229.

[codecov]

Codecov Report

Merging #2235 (056d2d7) into main (c273364) will decrease coverage by 0.01%.
The diff coverage is 77.77%.

@@             Coverage Diff              @@
##               main    #2235      +/-   ##
============================================
- Coverage     82.81%   82.79%   -0.02%     
- Complexity     2332     2340       +8     
============================================
  Files           306      306              
  Lines          8308     8319      +11     
  Branches        764      764              
============================================
+ Hits           6880     6888       +8     
- Misses         1116     1120       +4     
+ Partials        312      311       -1     

Impacted Files	Coverage Δ	Complexity Δ
...ucumber/core/resource/JarUriFileSystemService.java	90.24% <ø> (+2.43%)	24.00 <0.00> (+1.00)
.../src/main/java/io/cucumber/java/MethodScanner.java	81.25% <42.85%> (-6.85%)	34.00 <2.00> (+2.00)	⬇️
...va/io/cucumber/core/resource/ClasspathScanner.java	95.00% <100.00%> (+0.12%)	25.00 <2.00> (+2.00)
...va/io/cucumber/core/resource/ClasspathSupport.java	78.78% <100.00%> (+0.32%)	25.00 <1.00> (+1.00)
...in/java/io/cucumber/core/resource/PathScanner.java	77.14% <100.00%> (+2.14%)	8.00 <2.00> (+2.00)

---

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 c273364...056d2d7. Read the comment docs.