[MDB Ignore] General maintenance for SMES (#91587)

## About The Pull Request
- SMES now directly gives/takes charge to the power cells stored inside
its component parts instead of modifying a `charge` variable whose value
was set from the total charge of its stored cells
- Removed `capacity` var. It's now derived from the total cells
`max_charge`. Even then its value was set to this so manually setting it
was a waste
- Fixes #71918. Because of point 1, this also means if you install
rigged cells in the SMES it now explodes
- Adds examines & screentips for installing terminal & other tool acts
- Smes can be connected to the powernet with a multitool with the panel
open after construction.
- General maintenance for portable smes as well. Repaths it to machine
subtype instead of power cause all it's functionality wasn't used
- Removed a bunch of unused defines, autodoc and shuffled around other
code

## Changelog
🆑
qol: SMES has examines and screentips for various stuff
code: Improved code of SMES in general
fix: smes can be connected to the powernet with a multitool with the
panel open after construction
refactor: SMES now functions consistently with its power cells & the
RPED.
/🆑

tools/UpdatePaths/Scripts/91587_smes_bank.txt

@@ -0,0 +1 @@
+/obj/machinery/power/smesbank : /obj/machinery/smesbank