Add scenario schema and validation script for Break Escape scenarios

- Introduced `scenario-schema.json` to define the structure and requirements for scenario.json.erb files.
- Implemented `validate_scenario.rb` to render ERB templates to JSON and validate against the schema.
- Created a comprehensive `SCENARIO_JSON_FORMAT_GUIDE.md` to outline the correct format for scenario files, including required fields, room definitions, objectives, and common mistakes.

Gemfile.lock

@@ -81,6 +81,8 @@ GEM
       minitest (>= 5.1)
       securerandom (>= 0.3)
       tzinfo (~> 2.0, >= 2.0.5)
+    addressable (2.8.8)
+      public_suffix (>= 2.0.2, < 8.0)
     ast (2.4.3)
     base64 (0.3.0)
     benchmark (0.5.0)
@@ -106,6 +108,9 @@ GEM
       rdoc (>= 4.0.0)
       reline (>= 0.4.2)
     json (2.16.0)
+    json-schema (6.0.0)
+      addressable (~> 2.8)
+      bigdecimal (~> 3.1)
     language_server-protocol (3.17.0.5)
     lint_roller (1.1.0)
     logger (1.7.0)
@@ -165,6 +170,7 @@ GEM
     psych (5.2.6)
       date
       stringio
+    public_suffix (7.0.0)
     puma (7.1.0)
       nio4r (~> 2.0)
     pundit (2.5.2)
@@ -284,6 +290,7 @@ PLATFORMS
 
 DEPENDENCIES
   break_escape!
+  json-schema
   pry
   pry-byebug
   puma