Restore reinforcement pillar block activity

[trigger-segfault]

Describe the feature
In LRR beta screenshots, you can see 3D pillar models and lights that render over reinforced blocks. The activity assets for this are still in the game data under World/ProMeshes/Pillar. This visual can be restored to show in the game again.

Steps to implement
Programming for this feature is almost completely functional.

• BlockActivity functions need to be implemented.
• The Pillar activity file needs to be loaded and supplied in Level_BlockActivity_Create.
• Changes need to be made to support spawning in these block activities for blocks reinforced at the start of the level (is this even possible?).
• A graphics setting should be added to toggle on this visual. Changing the setting will need to handle the hiding and showing of existing activities and creation for existing reinforced blocks.

---

Screenshots
A reinforcement pillar as seen in First Person view.

Video
A reinforcement pillar building itself after the block is reinforced.

OpenLRR_ReinforcementPillarBuild.mp4