Add support for windows

[leriksen137]

Not all tests run on Windows due to encoding issues. With these changes, the tests succeed on Windows, or are skipped.

[leriksen137]

Two changes in files are only comments.

Here is an example output when I run test_cli.py on Windows:

============================= test session starts =============================
collecting ... collected 44 items

tests/test_cli.py::TestCompileDslSource::test_simple_signal_compiles
tests/test_cli.py::TestCompileDslSource::test_memory_and_lamp_compiles
tests/test_cli.py::TestCompileDslSource::test_with_custom_program_name
tests/test_cli.py::TestCompileDslSource::test_with_source_name_path
tests/test_cli.py::TestCompileDslSource::test_json_output
tests/test_cli.py::TestCompileDslSource::test_optimize_disabled
tests/test_cli.py::TestCompileDslSource::test_power_poles_option
tests/test_cli.py::TestCompileDslSource::test_syntax_error_fails
tests/test_cli.py::TestCompileDslSource::test_semantic_error_fails
tests/test_cli.py::TestCompileDslSource::test_different_log_levels
tests/test_cli.py::TestValidatePowerPoles::test_valid_small
tests/test_cli.py::TestValidatePowerPoles::test_valid_medium
tests/test_cli.py::TestValidatePowerPoles::test_valid_big
tests/test_cli.py::TestValidatePowerPoles::test_valid_substation
tests/test_cli.py::TestValidatePowerPoles::test_case_insensitive
tests/test_cli.py::TestValidatePowerPoles::test_none_value
tests/test_cli.py::TestValidatePowerPoles::test_invalid_type
tests/test_cli.py::TestSetupLogging::test_valid_log_level
tests/test_cli.py::TestCliMain::test_compile_string_input
tests/test_cli.py::TestCliMain::test_both_file_and_string_fails
tests/test_cli.py::TestCliMain::test_no_input_fails
tests/test_cli.py::TestCliMain::test_output_to_file
tests/test_cli.py::TestCliMain::test_custom_name
tests/test_cli.py::TestCliMain::test_no_optimize_flag
tests/test_cli.py::TestCliMain::test_power_poles_flag
tests/test_cli.py::TestCliMain::test_power_poles_value
tests/test_cli.py::TestCliMain::test_json_output
tests/test_cli.py::TestCliMain::test_log_level_debug
tests/test_cli.py::TestCliMain::test_log_level_info
tests/test_cli.py::TestCliMain::test_syntax_error_file
tests/test_cli.py::TestCliMain::test_layout_retries_option
tests/test_cli.py::TestCliMain::test_output_directory_creation
tests/test_cli.py::TestCliEdgeCases::test_string_with_debug_logging
tests/test_cli.py::TestCliEdgeCases::test_file_with_verbose_shows_messages
tests/test_cli.py::TestCliCoverageGaps::test_compile_with_all_options PASSED [ 2%]PASSED [ 4%]PASSED [ 6%]PASSED [ 9%]PASSED [ 11%]PASSED [ 13%]PASSED [ 15%]PASSED [ 18%]PASSED [ 20%]PASSED [ 22%]PASSED [ 25%]PASSED [ 27%]PASSED [ 29%]PASSED [ 31%]PASSED [ 34%]PASSED [ 36%]PASSED [ 38%]PASSED [ 40%]
tests/test_cli.py::TestSetupLogging::test_invalid_log_level PASSED [ 43%]
tests/test_cli.py::TestCliMain::test_compile_file PASSED [ 45%]PASSED [ 47%]PASSED [ 50%]PASSED [ 52%]PASSED [ 54%]PASSED [ 56%]PASSED [ 59%]PASSED [ 61%]PASSED [ 63%]PASSED [ 65%]PASSED [ 68%]PASSED [ 70%]PASSED [ 72%]PASSED [ 75%]PASSED [ 77%]PASSED [ 79%]PASSED [ 81%]PASSED [ 84%]
tests/test_cli.py::TestCliCoverageGaps::test_compile_with_no_optimize_flag PASSED [ 86%]
tests/test_cli.py::TestCliCoverageGaps::test_compile_source_with_warnings PASSED [ 88%]
tests/test_cli.py::TestCliCoverageGaps::test_compile_power_poles_substation PASSED [ 90%]
tests/test_cli.py::TestCliCoverageGaps::test_compile_complex_program PASSED [ 93%]
tests/test_cli.py::TestCliCoverageGaps::test_read_file_error_unreadable_file SKIPPED [ 95%]
Skipped: chmod permission test not reliable on Windows

tests/test_cli.py::TestCliCoverageGaps::test_read_file_error_nonexistent_file PASSED [ 97%]
tests/test_cli.py::TestCliCoverageGaps::test_write_file_error_unwritable_directory SKIPPED [100%]
Skipped: chmod permission test not reliable on Windows

======================== 42 passed, 2 skipped in 6.37s ========================