chore: ignore Fable Beam generated files for Beam quicktest (#4437)

Author: MangelMaxime

.gitignore

@@ -16,6 +16,10 @@ src/quicktest/**/*.js
 src/quicktest-py/**/*.py
 src/quicktest-rust/**/*.rs
 src/quicktest-dart/**/*.dart
+src/quicktest-beam/**/*.beam
+src/quicktest-beam/**/*.erl
+src/quicktest-beam/src/*.src
+src/quicktest-beam/rebar.config
 **/fable_modules/**
 
 ## Ignore Visual Studio temporary files, build results, and