Move from log -> tracing; enable dynamic selection

[reubeno]

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Test Results

344 tests   329 ✅  2m 14s ⏱️
 56 suites   15 💤
  8 files      0 ❌

Results for commit bba35d3.

[github-actions]

Performance Benchmark Report

Benchmark name	Baseline (ns)	Test/PR (ns)	Delta (ns)	Delta %
expand_one_string	3312 ns	3319 ns	+7 ns	🟠 +0.21%
instantiate_shell	52167 ns	51763 ns	-404 ns	🟢 -0.77%
instantiate_shell_with_init_scripts	27536572 ns	26924012 ns	-612560 ns	🟢 -2.22%
parse_bash_completion	6620050 ns	6710867 ns	+90817 ns	🟠 +1.37%
parse_sample_script	10899 ns	11066 ns	+167 ns	🟠 +1.53%
run_echo_builtin_command	89941 ns	92310 ns	+2369 ns	🟠 +2.63%
run_one_builtin_command	107221 ns	110839 ns	+3618 ns	🟠 +3.37%
run_one_external_command	1791041 ns	1775159 ns	-15882 ns	🟢 -0.89%
run_one_external_command_directly	1032801 ns	1027859 ns	-4942 ns	🟢 -0.48%

Code Coverage Report

Package	Base Coverage	New Coverage	Difference
cli.src	🟢 78.82%	🟠 74.58%	🔴 -4.24%
interactive-shell.src	🟢 75.88%	🟢 75.88%	⚪ 0%
parser.src	🟢 85.84%	🟢 85.86%	🟢 0.02%
shell.src	🟢 80.06%	🟢 80.06%	⚪ 0%
shell.src.builtins	🟠 63.98%	🟠 63.98%	⚪ 0%
Overall Coverage	🟢 78.09%	🟢 78.05%	🔴 -0.04%

Minimum allowed coverage is 0%, this run produced 78.05%