perf(routing): replace recursion in favor of iteration

[blackshadev]

What

Refactor the adding of routes to the routing tree by replacing recursion with iteration.

Recursion is pretty inefficient in PHP. This relatively small refactor is roughly 10% faster

Benchmarks

This branch

+------------------------+-----------------------------------------+-----+------+-----+----------+---------+--------+
| benchmark              | subject                                 | set | revs | its | mem_peak | mode    | rstdev |
+------------------------+-----------------------------------------+-----+------+-----+----------+---------+--------+
| RouteConfiguratorBench | benchRouteConfigConstructionRouteAdding |     | 1000 | 5   | 2.100mb  | 1.016ms | ±0.32% |
+------------------------+-----------------------------------------+-----+------+-----+----------+---------+--------+

Main

+------------------------+-----------------------------------------+-----+------+-----+----------+---------+--------+
| benchmark              | subject                                 | set | revs | its | mem_peak | mode    | rstdev |
+------------------------+-----------------------------------------+-----+------+-----+----------+---------+--------+
| RouteConfiguratorBench | benchRouteConfigConstructionRouteAdding |     | 1000 | 5   | 2.101mb  | 1.101ms | ±0.94% |
+------------------------+-----------------------------------------+-----+------+-----+----------+---------+--------+

[brendt]

Nice! You're on a roll @blackshadev 🌊