Make fluid direction finding code more compact and readable.

* Fixed pipes not building correctly to rectangular neighbors by detecting adjacent edges.
* Fixed pipes being build in a grid if connector is offset.  Will now build an L-shape if the miner's connector is offset in both X and Y.
* Added more debug messages about pipes.

- Add setting for what pipe to replace fluid-using miners with.
- Add second setting for what pipe to use in space zones.
- Validate that settings specify an existing pipe entity names after setting is changed, mods are changed, and when deconstructions are ordered.

+  Compatibility:
    - Added mod settings to customize what pipe is used when replacing miners (i.e. kr-steel-pipe).
  Bugfixes:
    - Fixed crashes when Editor Extensions "instant deconstruction" is enabled.