perf: reimplement colon command as a "simple builtin"

[reubeno]

No description provided.

[github-actions]

Test Results

    2 files      9 suites   1m 22s ⏱️
  574 tests   574 ✅ 0 💤 0 ❌
1 134 runs  1 134 ✅ 0 💤 0 ❌

Results for commit 95acf24.

♻️ This comment has been updated with latest results.

[github-actions]

Performance Benchmark Report

Benchmark name	Baseline (μs)	Test/PR (μs)	Delta (μs)	Delta %
clone_shell_object	16.98 μs	17.72 μs	0.74 μs	🟠 +4.37%
eval_arithmetic	0.19 μs	0.18 μs	-0.00 μs	⚪ Unchanged
expand_one_string	1.65 μs	1.60 μs	-0.04 μs	⚪ Unchanged
for_loop	40.86 μs	32.90 μs	-7.96 μs	🟢 -19.48%
function_call	3.52 μs	3.32 μs	-0.20 μs	⚪ Unchanged
instantiate_shell	47.52 μs	48.45 μs	0.93 μs	⚪ Unchanged
instantiate_shell_with_init_scripts	24499.91 μs	22372.51 μs	-2127.40 μs	🟢 -8.68%
parse_bash_completion	1683.97 μs	1686.11 μs	2.15 μs	⚪ Unchanged
parse_sample_script	2.22 μs	2.21 μs	-0.01 μs	⚪ Unchanged
run_echo_builtin_command	16.09 μs	16.18 μs	0.08 μs	⚪ Unchanged
run_one_external_command	1871.14 μs	1924.90 μs	53.76 μs	🟠 +2.87%

Code Coverage Report: Only Changed Files listed

Package	Base Coverage	New Coverage	Difference
brush-core/src/builtins.rs	🔴 45.81%	🔴 47.57%	🟢 1.76%
brush-core/src/builtins/colon.rs	🟢 100%	🔴 44.44%	🔴 -55.56%
brush-core/src/builtins/factory.rs	🟢 82.35%	🟢 94.69%	🟢 12.34%
brush-core/src/jobs.rs	🔴 43.1%	🔴 37.07%	🔴 -6.03%
Overall Coverage	🟢 76.68%	🟢 76.72%	🟢 0.04%

Minimum allowed coverage is 70%, this run produced 76.72%

[Copilot]

Copilot reviewed 4 out of 4 changed files in this pull request and generated 1 comment.

[Copilot]

The error message 'man page not yet implemented' is unclear. It should be updated to 'Man page rendering is not yet implemented for this command.'

Suggested change

	builtins::ContentType::ManPage => error::unimp("man page not yet implemented"),
	builtins::ContentType::ManPage => error::unimp("Man page rendering is not yet implemented for this command."),