[Innawoods] Fixes trails spawning manmade stuff

[Maarifrah]

Summary

Bugfixes "Innawoods - Fixes trails spawning manmade stuff"

Purpose of change

Trails in Innawoods were spawning things like map boards, signs, benches, ect. As indicated by the Innawoods readme.md, having man-made objects present is not within the design goals of the mod.
Here are the precise issues addressed:

• Some segments of forest trails were spawning map boards and signs.
• Some variations of 24x24 trail intersections (which are also called for trail endings, not just intersections) were spawning nests with furniture such as benches, horse posts, a tiny wooden shed with supplies in it, and a fire ring.

Describe the solution

For the parts of the forest trails that were spawning map boards and signs, I simply overwrote the vanilla game's trail palette and removed any nest spawns for man-made objects, using null instead.

The problem with trail intersections required using the solution that aftershock: exoplanet and desert region used to control roads, bridges and lakes spawning:

1. In the base game, assigns a weight global variable to all vanilla trails that include the offending 24x24 intersection in their list for potential chunk spawns with a value of 1000.
2. Creates an EoC in Innawoods that fires at game start that reduces this global variable to 0.
3. Replacement mapgen files within the innawoods mod are then used in lieu of the vanilla mapgen files that were disabled by this EoC.
4. These replacement mapgen files use a modded innawoods-specific variant of the intersection that do not include the man-made objects.

Describe alternatives you've considered

Assigning the global variable to all the individual segments of vanilla trails. I didn't do this because then I would be required to include replacement mapgen for all of those affected trails. I decided that this would be unnecessary, so I kept the weight global variables specific to the parts of trails that were causing issues.

Testing

INNAWOODS:

The intersections (the big round dirt patches) are no longer spawning furniture, and the other trail segments aren't spawning signs/ect.

VANILLA:

The base game is unaffected. Intersections retain the potential to spawn man-made furniture and other trail segments are correctly spawning their signs and map boards.

Additional context

[github-actions]

Auto-requesting reviews from non-collaborators: @Light-Wave

[Light-Wave]

Sounds reasonable. Innawood spawning maps and benches and stuff is indeed a bug.