fix(noUndeclaredDependencies): ignore invalid package names, bun import, and recognize Definitely Typed

[Conaclos]

Summary

Fix #3874
Fix #3872

We now ensure that the package name is valid before checking if it is a dependency.
Note that I deliberately accepted some invalid package names (package names starting with an underscore and package name with uppercase character) in order to catch users' typo errors.

We also ignore bun imports.
This looks fair because the NPM module named bun is from the bun runtime.

Test Plan

I added some tests.

[codspeed-hq]

CodSpeed Performance Report

Merging #3893 will improve performances by 22.83%

_{Comparing conaclos/noUndeclaredDependencies (ab3a0f5) with main (30e238d)}

Summary

⚡ 2 improvements
✅ 105 untouched benchmarks

Benchmarks breakdown

	Benchmark	main	conaclos/noUndeclaredDependencies	Change
⚡	router_17129688031671448157.ts[cached]	2.2 ms	2.1 ms	+7.86%
⚡	big5-added_15586211152145260264.json[cached]	537.8 µs	437.8 µs	+22.83%