Add cli convert subcommand, from raw KLE to JSON (#6898)

* Add initial pass at KLE convert

* Add cli log on convert

* Move kle2xy, add absolute filepath arg support

* Add overwrite flag, and context sensitive conversion

* Update docs/cli.md

* Fix converter.py typo

* Add convert unit test

* Rename to kle2qmk

* Rename subcommand

* Rename subcommand to kle2json

* Change tests to cover rename

* Rename in __init__.py

* Update CLI docs with new subcommand name

* Fix from suggestions in PR #6898

* Help with cases of case sensitivity

* Update cli.md

* Use angle brackets to indicate required option

* Make the output text more accurate

lib/python/qmk/tests/test_cli_commands.py

@@ -19,6 +19,8 @@ def test_config():
     assert result.returncode == 0
     assert 'general.color' in result.stdout
 
+def test_kle2json():
+    assert check_subcommand('kle2json', 'kle.txt', '-f').returncode == 0
 
 def test_doctor():
     result = check_subcommand('doctor')