Major Performance Boost in line_col Function with bytecount Integration

[JoshuaBatty]

Description

This PR introduces a significant performance improvement to the line_col function by integrating the bytecount crate, leading to more efficient newline character counting in strings. Here are the results of the sway-lsp benchmarks. 🚀

Type	Previous Duration	Current Duration	Speedup	Improvement %
highlight	108.30 ms	14.704 ms	7.36x	+86.44%
tokens_at_position	41.317 ms	6.9646 ms	5.93x	+83.14%
parent_decl_at_position	41.319 ms	6.9321 ms	5.96x	+83.22%
traverse	165.60 ms	28.811 ms	5.75x	+82.60%
code_action	58.034 ms	10.734 ms	5.41x	+81.52%
rename	119.33 ms	11.773 ms	10.14x	+90.14%
completion	48.597 ms	13.809 ms	3.52x	+71.59%
inlay_hints	8.6783 ms	6.0263 ms	1.44x	+30.52%
format	46.893 ms	43.834 ms	1.07x	+6.52%
compile	1.1505 s	1.0962 s	1.05x	+4.71%
code_lens	231.30 ns	221.57 ns	1.04x	+4.21%
hover	6.1517 ms	5.9984 ms	1.03x	+2.49%
tokens_for_file	8.2928 ms	8.0658 ms	1.03x	+2.73%
on_enter	307.96 ns	300.81 ns	1.02x	+2.32%
document_symbol	6.1988 ms	6.7087 ms	0.92x	-7.90%
token_at_position	6.0207 ms	5.9769 ms	1.01x	+0.73%
idents_at_position	3.2212 ms	3.1946 ms	1.01x	+0.83%
did_change_with_caching	175.55 ms	174.16 ms	1.01x	+0.79%
prepare_rename	6.0136 ms	6.0365 ms	1.00x	-0.38%
semantic_tokens	16.790 ms	17.340 ms	0.97x	-3.28%
goto_definition	5.9613 ms	6.0710 ms	0.98x	-1.84%