Clean up compilation build files

[avborup]

Either automatically delete the file at exe_path or add a post_test-like command to the config (command that runs after a test is complete).

[RishiKumarRay]

do we have to add this in Github Actions?

[avborup]

do we have to add this in Github Actions?

No, this would be something that kitty does while/after running kitty test. The two solutions I suggest would be as follows:

Proposal 1

A after_test_command field can be added to each language in the kitty.yml file. Assume we use Java - it would be nice to automatically remove any built .class file. An example config could be

- name: Java
  file_extension: java
  compile_command: javac $SRC_PATH
  run_command: java -cp $DIR_PATH $SRC_FILE_NAME_NO_EXT
  # Below is new (not implemented)
  after_test_command: find . -name "*.class" -type f -delete

Proposal 2

The code automatically removes the file at EXE_PATH (whose value is generated when parsing the config file) after the test runner has completed.

I prefer proposal 1, because it makes it far easier to customise on a per-language basis.