feat: Add sal-net package to workspace

- Add new sal-net package to the workspace.
- Update MONOREPO_CONVERSION_PLAN.md to reflect the
  addition of the sal-net package and mark it as
  production-ready.
- Add Cargo.toml and README.md for the sal-net package.

net/tests/rhai/01_tcp_operations.rhai

@@ -0,0 +1,108 @@
+// TCP Operations Test Suite
+// Tests TCP connectivity functions through Rhai integration
+
+print("=== TCP Operations Test Suite ===");
+
+let test_count = 0;
+let passed_count = 0;
+
+// Test 1: TCP check on closed port
+test_count += 1;
+print(`\nTest ${test_count}: TCP check on closed port`);
+let test1_result = tcp_check("127.0.0.1", 65534);
+if !test1_result {
+    print("  ✓ PASSED");
+    passed_count += 1;
+} else {
+    print("  ✗ FAILED");
+}
+
+// Test 2: TCP check on invalid host
+test_count += 1;
+print(`\nTest ${test_count}: TCP check on invalid host`);
+let test2_result = tcp_check("nonexistent-host-12345.invalid", 80);
+if !test2_result {
+    print("  ✓ PASSED");
+    passed_count += 1;
+} else {
+    print("  ✗ FAILED");
+}
+
+// Test 3: TCP check with empty host
+test_count += 1;
+print(`\nTest ${test_count}: TCP check with empty host`);
+let test3_result = tcp_check("", 80);
+if !test3_result {
+    print("  ✓ PASSED");
+    passed_count += 1;
+} else {
+    print("  ✗ FAILED");
+}
+
+// Test 4: TCP ping localhost
+test_count += 1;
+print(`\nTest ${test_count}: TCP ping localhost`);
+let test4_result = tcp_ping("localhost");
+if test4_result == true || test4_result == false {
+    print("  ✓ PASSED");
+    passed_count += 1;
+} else {
+    print("  ✗ FAILED");
+}
+
+// Test 5: TCP ping invalid host
+test_count += 1;
+print(`\nTest ${test_count}: TCP ping invalid host`);
+let test5_result = tcp_ping("nonexistent-host-12345.invalid");
+if !test5_result {
+    print("  ✓ PASSED");
+    passed_count += 1;
+} else {
+    print("  ✗ FAILED");
+}
+
+// Test 6: Multiple TCP checks
+test_count += 1;
+print(`\nTest ${test_count}: Multiple TCP checks`);
+let ports = [65534, 65533, 65532];
+let all_closed = true;
+for port in ports {
+    let result = tcp_check("127.0.0.1", port);
+    if result {
+        all_closed = false;
+        break;
+    }
+}
+if all_closed {
+    print("  ✓ PASSED");
+    passed_count += 1;
+} else {
+    print("  ✗ FAILED");
+}
+
+// Test 7: TCP operations consistency
+test_count += 1;
+print(`\nTest ${test_count}: TCP operations consistency`);
+let result1 = tcp_check("127.0.0.1", 65534);
+let result2 = tcp_check("127.0.0.1", 65534);
+if result1 == result2 {
+    print("  ✓ PASSED");
+    passed_count += 1;
+} else {
+    print("  ✗ FAILED");
+}
+
+// Summary
+print("\n=== TCP Operations Test Results ===");
+print(`Total tests: ${test_count}`);
+print(`Passed: ${passed_count}`);
+print(`Failed: ${test_count - passed_count}`);
+
+if passed_count == test_count {
+    print("🎉 All TCP tests passed!");
+} else {
+    print("⚠️  Some TCP tests failed.");
+}
+
+// Return success if all tests passed
+passed_count == test_count