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.

About/About.xml

@@ -0,0 +1,38 @@
+<?xml version="1.0" encoding="utf-8"?>
+<ModMetaData>
+  <packageId>flan.institution</packageId>
+  <name>Institution</name>
+  <author>flan</author>
+  <supportedVersions>
+    <li>1.6</li>
+  </supportedVersions>
+  <description>Prison Architect in RimWorld: every pawn has a criminal propensity on a spectrum -- nature (traits) x nurture (mood, mistreatment, treatment) -- and the colony can police it.
+
+This is the Institution suite in one install, with a checkbox per layer in the mod settings (all ON by default):
+
+- Contraband -- the physical smuggling loop. Prisoners conceal what they walk in with, whittle shivs from their cell's own furniture, and dig Prison-Architect tunnels under the wall. Wardens search the right prisoner first, by the record -- and a bent warden looks the other way, or smuggles for them.
+
+- Justice -- the corrections layer. Classification grades every held pawn by what they have actually done. A colony has a climate of order that crime erodes and visible justice restores, and it feeds back into everyone's disposition. Discipline hardens or reforms; parole lets the reformed out; regime gives prisoners the recreation vanilla denies them.
+
+- Gangs -- the social layer. Disposed pawns band together along the lines they already share and move contraband among themselves; rival gangs fight, inside the wire or out, and the fight is a crime. A healthy, well-run colony grows few gangs, if any.
+
+Turn any layer off in Options -> Mod Settings and it goes inert immediately.
+
+Requires Harmony (for the recreation feature). The suite's shared Core engine ships inside this mod, so there is no separate dependency to install. Pairs with the standalone Institution: Ward (psychiatric commitment) and Foul Play (the vessel/substance framework, which bridges in).
+
+Part of the Institution suite.
+
+AI disclosure: developed with substantial assistance from Claude (Anthropic).
+  </description>
+  <modDependencies>
+    <li>
+      <packageId>brrainz.harmony</packageId>
+      <displayName>Harmony</displayName>
+      <steamWorkshopUrl>steam://url/CommunityFilePage/2009463077</steamWorkshopUrl>
+    </li>
+  </modDependencies>
+  <loadAfter>
+    <li>Ludeon.RimWorld</li>
+    <li>brrainz.harmony</li>
+  </loadAfter>
+</ModMetaData>