Add XIC v1 Engine — Execute-In-Compressed Runtime Integration

- Implemented XIC loader, VM, ops, and executor
- Wired RUN_PROMPT directly to execute_gx() (no stubs)
- Added demo compressed model and demo XIC program
- Integrated XIC into glyph_runner.py with --xic flag and shell support
- Added full validation suite and XIC_INTEGRATION_REPORT.md
- Verified real GSZ3 decompression and execution pipeline

This commit introduces a complete compressed-space execution engine
with zero breaking changes and full backward compatibility.

glyph_runner.py

@@ -1,10 +1,27 @@
 import sys
+from pathlib import Path
 from xic_shell import xic_cli
+from xic_executor import run_xic
 
 def main():
     argv = sys.argv[1:]
     if not argv:
-        print("Usage: glyph <command>")
+        print("Usage: glyph <command> [options]")
+        print("  glyph xic [run|inspect|...]  - XIC shell")
+        print("  glyph --xic <path>           - Run XIC program directly")
+        return
+
+    # Check for --xic flag (direct XIC execution)
+    if argv[0] == "--xic":
+        if len(argv) < 2:
+            print("Usage: glyph --xic <xic_program.gx.json>")
+            return
+        xic_path = argv[1]
+        try:
+            run_xic(xic_path, debug=False)
+        except Exception as e:
+            print(f"Error: {e}")
+            sys.exit(1)
         return
 
     cmd = argv[0]