feat: Allowing custom runner configs

[diervo]

Details

Also fixed a bunch of issues with best-agent

Does this PR introduce a breaking change?

• No

[salesforce-best-lwc-internal]

Benchmark results

Base commit: f2898e6 | Target commit: 4273617

simple-benchmarks

object_keys	metric	base(f2898e6)	target(4273617)	trend
stringify_parse	duration	36.10 (± 0.40 ms)	35.80 (± 0.30 ms)	0.83% 👍
deep_merge	duration	28.00 (± 1.10 ms)	25.80 (± 0.60 ms)	7.86% 👍

lwc-examples-prod

simple-item	metric	base(f2898e6)	target(4273617)	trend
create_and_render	duration	54.00 (± 1.30 ms)	51.25 (± 0.65 ms)	5.09% 👍

lwc-examples-compat

simple-item	metric	base(f2898e6)	target(4273617)	trend
create_and_render	duration	94.60 (± 5.10 ms)	87.50 (± 1.50 ms)	7.51% 👍