Restructure: remove separate parser

tests/unit/test_parser.py

@@ -1,10 +0,0 @@
-from ergogen_footprint_converter.parser import Parser
-import pytest
-from pathlib import Path
-
-def test_parser_filenotexists():
-    with pytest.raises(Exception, match=r".*Given path is not a file.*"):
-        Parser(Path("nop"))
-    
-def test_parse():
-    None