Replaced with specialised solution based on original types.

- Removed instances of `&NodeId` in function arguments since `NodeId` is copy and only two `usize`'s wide.
- Changed documentation references to `O(V)` to `O(N)` (nodes instead of verticies)

Co-Authored-By: Lixou <82600264+DasLixou@users.noreply.github.com>

Co-Authored-By: Lixou <82600264+DasLixou@users.noreply.github.com>

Allows for a minimal-allocation iterator interface. Also switched to `SmallVec` to improve performance in sparse graphs (the more likely use-case)

The `nocase` naming was a hangover from the `petgraph` migration.

Co-Authored-By: vero <11307157+atlv24@users.noreply.github.com>

…evyECS

…evyECS

…evyECS