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/kle.txt

@@ -0,0 +1,5 @@
+["¬\n`","!\n1","\"\n2","£\n3","$\n4","%\n5","^\n6","&\n7","*\n8","(\n9",")\n0","_\n-","+\n=",{w:2},"Backspace"],
+[{w:1.5},"Tab","Q","W","E","R","T","Y","U","I","O","P","{\n[","}\n]",{x:0.25,w:1.25,h:2,w2:1.5,h2:1,x2:-0.25},"Enter"],
+[{w:1.75},"Caps Lock","A","S","D","F","G","H","J","K","L",":\n;","@\n'","~\n#"],
+[{w:1.25},"Shift","|\n\\","Z","X","C","V","B","N","M","<\n,",">\n.","?\n/",{w:2.75},"Shift"],
+[{w:1.25},"Ctrl",{w:1.25},"Win",{w:1.25},"Alt",{a:7,w:6.25},"",{a:4,w:1.25},"AltGr",{w:1.25},"Win",{w:1.25},"Menu",{w:1.25},"Ctrl"]

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')