Consolidate the suite into one installable Institution mod with toggles

This repo is now the single player-facing mod. It bundles the whole engine and
all three feature layers into one folder -- Core, Contraband, Justice, and Gangs
DLLs plus Contraband's Defs -- with one About.xml and a settings shim that turns
each layer on or off from a checkbox (all on by default). A player installs one
mod (this) and Harmony; no separate Core dependency.

- Source/Institution: the only new code, a settings shim (InstitutionMod +
  InstitutionModSettings) that writes the player's choices into Core's shared
  InstitutionSettings. It owns no gameplay.
- Tools/package.sh: rebuilds the sibling DLLs clean and vendors them + Contraband's
  content in here, so the repo stays a complete drop-in.
- Assemblies/, Defs/, Textures/, Languages/: the vendored, assembled mod.

Still fully modular and splittable: the feature code stays in its own repos and
DLLs (their About.xml files remain), so breaking this back into separate mods is
just shipping them individually -- no code change.

Languages/English/Keyed/Contraband.xml

@@ -0,0 +1,12 @@
+<?xml version="1.0" encoding="utf-8" ?>
+<LanguageData>
+
+  <Contraband_Found>{0} searched {1} and found hidden {2}.</Contraband_Found>
+  <Contraband_TunnelFound>{0} searched {1} and uncovered a tunnel dug with a hidden {2}.</Contraband_TunnelFound>
+  <Contraband_TunnelBreached>{0} has tunnelled out under the perimeter and escaped.</Contraband_TunnelBreached>
+
+  <Contraband_VesselBurst>A {0} has burst under its own pressure.</Contraband_VesselBurst>
+  <Contraband_Fermentation>Fermentation: {0}%</Contraband_Fermentation>
+  <Contraband_FermentOverdue>Overdue. The pressure has to go somewhere.</Contraband_FermentOverdue>
+
+</LanguageData>