Added integrity to transformer and plasma generator, made transformer more costly to build.

[PetMudstone]

Purpose

This PR adds the integrity script to transformers and makes them more costly to build (now takes 30 metal and 10 build time). I did this because people kept building indestructible transformers (only cost 2 metal and 1 build time before) all over the place, which resulted in areas being blocked off.

I also added the integrity script to the plasma generator because someone suggested it on the Discord.

Please make sure you have followed the self checks below before submitting a PR:

• Code is sufficiently commented
• Code is indented with tabs and not spaces
• The PR does not include any unnecessary .meta, .prefab or .unity (scene) changes
• The PR does not bring up any new compile errors
• The PR has been tested in editor
• Any new files are named using PascalCase (to avoid issues on case sensitive file systems)
• Any new / changed components follow the Component Development Checklist
• Any new objects / items follow the Creating Items and Objects Guide (especially concerning the use of prefab variants)
• The PR has been tested in multiplayer (with 2 clients and late joiners, if applicable)
• The PR has been tested with round restarts.
• The PR has been tested on moving / rotating / rotated-before-joining matrices (if applicable)