feat: Prepare for code modularization and cleanup

- Archive old documentation and test files to `docs/archive/` and `local_tests/`.
- Remove various temporary and old files from the project root.
- Add `nekocode-rust` analysis tool and its output files (`nekocode/`, `.nekocode_sessions/`, `analysis.json`).
- Minor updates to `apps/chip8_nyash/chip8_emulator.nyash` and `local_tests` files.

This commit cleans up the repository and sets the stage for further code modularization efforts, particularly in the `src/interpreter` and `src/parser` modules, based on recent analysis.

local_tests/test_final_validation.nyash

@@ -0,0 +1,51 @@
+// Final validation test for the SocketBox state preservation fix
+// This test replicates the exact scenario described in issue #74
+
+static box Main {
+    init { server }
+    
+    main() {
+        print("=== Issue #74 Validation Test ===")
+        print("Testing SocketBox state preservation across field accesses")
+        print("")
+        
+        // Create SocketBox and store in field
+        me.server = new SocketBox()
+        
+        print("Step 1: Initial state")
+        print("me.server.isServer(): " + me.server.isServer())  // Should be false
+        print("")
+        
+        print("Step 2: Calling bind() to set server state")
+        me.server.bind("127.0.0.1", 8080)  // This should set is_server=true
+        print("bind() completed")
+        print("")
+        
+        print("Step 3: Checking state after bind()")
+        print("me.server.isServer(): " + me.server.isServer())  // Should be true if fix works!
+        print("")
+        
+        // Additional tests: multiple accesses should all return same state
+        print("Step 4: Multiple field access test")
+        local server1
+        server1 = me.server
+        print("server1.isServer(): " + server1.isServer())  // Should be true
+        
+        local server2
+        server2 = me.server
+        print("server2.isServer(): " + server2.isServer())  // Should be true
+        
+        print("")
+        print("=== Test Summary ===")
+        if (me.server.isServer()) {
+            print("✅ SUCCESS: SocketBox state preserved across field accesses!")
+            print("   The 'Everything is Box' design now correctly shares state")
+            print("   for stateful boxes like SocketBox, P2PBox, etc.")
+        } else {
+            print("❌ FAILURE: SocketBox state was not preserved")
+            print("   The fix did not work as expected")
+        }
+        
+        return me.server.isServer()
+    }
+}