Combine Workshop addon and fix prison startup

Merge owned systems into one addon while preserving resource identities. Gate player admission on the replicated prison scene, restore the original framed door, and hold enemy AI until escape. Correct scenario branding and author metadata, include publishing assets, and retain regression and native verification evidence.

addons/core/Missions/ERR_Everon.conf

@@ -0,0 +1,11 @@
+SCR_MissionHeader {
+ World "{B6C516F86302C679}Worlds/ERR_Everon.ent"
+ SystemsConfig "{C50579A2EC48E8EF}Configs/Systems/MissionSystems.conf"
+ m_sName "Escapists Reintroduced — Everon"
+ m_sAuthor "Jakub Jim Žáček"
+ m_sDescription "Independent escape prototype. Development scenario; runtime validation in progress."
+ m_sGameMode "Escape"
+ m_iPlayerCount 12
+ m_eSaveTypes 0
+ m_bShowInScenarioMenu 1
+}

addons/core/Missions/ERR_Everon.conf.meta

@@ -0,0 +1,9 @@
+MetaFileClass {
+ Name "{C1E20667DCE324ED}Missions/ERR_Everon.conf"
+ Configurations {
+  ResourceClass PC {
+  }
+  ResourceClass HEADLESS : PC {
+  }
+ }
+}

addons/core/Missions/ERR_Everon_Base.conf

@@ -1,11 +1,11 @@
 SCR_MissionHeader {
  World "{B6C516F86302C679}Worlds/ERR_Everon.ent"
  SystemsConfig "{C50579A2EC48E8EF}Configs/Systems/MissionSystems.conf"
- m_sName "Rereintroduced: Everon Base (development)"
- m_sAuthor "Rereintroduced contributors"
- m_sDescription "Independent base escape mission using vanilla Reforger. Companion addons optional. Development scenario."
+ m_sName "Escapists Reintroduced — Everon"
+ m_sAuthor "Jakub Jim Žáček"
+ m_sDescription "Legacy diagnostic header for the integrated Escapists Reintroduced mod."
  m_sGameMode "Escape"
  m_iPlayerCount 12
  m_eSaveTypes 0
- m_bShowInScenarioMenu 1
+ m_bShowInScenarioMenu 0
 }