cere: upgrade and expand telepad network (ParadiseSS13#25089)

* cere: upgrade and expand telepad network

* no parts in cere telepads to avoid taking advantage of high-level parts

* Apply suggestions from code review

Co-authored-by: Henri215 <77684085+Henri215@users.noreply.github.com>

* fix a bunch of pre-merge issues

* whoopsies

* ahhhhhh

* review changes #1

* fix horrid doublewalls in evac

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Co-authored-by: Henri215 <77684085+Henri215@users.noreply.github.com>