[DinoMod]Add monster Pachycephalosaurus

[LyleSY]

New content, adds egg laying and rideable Pachycephalosaurus, tougher and less common than gallimimus

Summary

SUMMARY: Content "Adds new monster 'Pachycephalosaurus'"

Purpose of change

Adds monster variety, a third mount with a unique look

Describe the solution

New monster dino, similar to gallimimus, also a mount, but a little more dangerous, half as common, doesn't spawn in packs, with twice the armor against bashing. Spawns in woods, also adding egg laying. Will need additional egg edit and linting before merging.

Describe alternatives you've considered

No Pachycephalosaurus, giving it a smash special attack, giving it even more dangerous stats. I think it is an interesting enough dino to include, especially as a mount. I don't want to put anything super dangerous in the woods, I like honoring the tradition in the game of keeping the woods as a relatively safe place for new players to get murdered by a moose, though I could see some value in bumping up Pachycephalosaurus to moose level if this plays too much like a gallimimus, which was modeled on deer.

Testing

Still in development, will test once all the pieces are in place to test with. Egg laying makes testing a little more complicated with file management

Additional context

This is the first of several planned new dinosaur additions intended to make the mod feel more alive and exciting

[LyleSY]

Testing looks good, game loads, debug spawn works, interactions make sense, runs from danger, follows when tamed. Not sure what's failing those checks.

[LyleSY]

Snooping on more recent pulls suggests that the tests are fixed now. Added an edit for dimorphodon eggs to reset the tests. Actual dimorphodon egg laying is planned but not yet enabled here.