cc: plastic-everywhere + advanced-contains-basic upgrade chains

Two design changes:

1) Every electronic CC item now requires tfmg:plastic_sheet. Plastic is
   the electrical insulator and gates ALL CC tech behind TFMG's full
   oil chain (crude oil -> naphtha -> distillation -> molten plastic
   -> sheet). Even cable -- you can't lay wires without insulation.

2) Advanced items now embed their Basic counterpart in the recipe:
   - computer_advanced  contains  computer_normal
   - monitor_advanced   contains  monitor_normal
   - wireless_modem_advanced  contains  wireless_modem_normal
   - pocket_computer_advanced contains pocket_computer_normal
   - turtle_advanced    contains  computer_advanced  (which contains
                                  computer_normal -- chained upgrade)

   This makes the progression literal -- you can't skip Basic to make
   Advanced. You upgrade through, paying both costs.

Other tweaks:
- Replaced create:railway_casing with create:industrial_iron_block in
  the Advanced Computer recipe. Railway casing is thematically tied to
  trains, not computing -- creates a weird "build trains to make a
  computer" dependency. industrial_iron_block fits the server-rack
  aesthetic and is a more general Create tier-3 material.
- Added plastic to disk_drive, wired_modem, printer, redstone_relay,
  speaker (recipes that previously skipped it).

Bumps to 0.19.3.

pack/pack.lock.json

@@ -1,7 +1,7 @@
 {
   "$schema": "Brass-and-Sigil pack.lock.json - generated, do not edit by hand unless you know what you are doing",
   "name": "Brass and Sigil",
-  "version": "0.19.2",
+  "version": "0.19.3",
   "minecraft": "1.21.1",
   "loader": {
     "type": "neoforge",