feat: Add Redis client module and tests

- Add a new Redis client module to the SAL library.
- Implement Rhai wrappers for Redis connection and operations.
- Add comprehensive test suite for the Redis client module.
- Update documentation to include Redis client module details.
- Add .gitignore entries to exclude test logs and files.

src/rhai_tests/redisclient/run_all_tests.rhai

@@ -0,0 +1,121 @@
+// run_all_tests.rhai
+// Runs all Redis client module tests
+
+print("=== Running Redis Client Module Tests ===");
+
+// Custom assert function
+fn assert_true(condition, message) {
+    if !condition {
+        print(`ASSERTION FAILED: ${message}`);
+        throw message;
+    }
+}
+
+// Helper function to check if Redis is available
+fn is_redis_available() {
+    try {
+        // Try to execute a simple PING command
+        let ping_result = redis_ping();
+        return ping_result == "PONG";
+    } catch(err) {
+        print(`Redis connection error: ${err}`);
+        return false;
+    }
+}
+
+// Run each test directly
+let passed = 0;
+let failed = 0;
+let skipped = 0;
+
+// Check if Redis is available
+let redis_available = is_redis_available();
+if !redis_available {
+    print("Redis server is not available. Skipping all Redis tests.");
+    skipped = 2; // Skip both tests
+} else {
+    // Test 1: Redis Connection
+    print("\n--- Running Redis Connection Tests ---");
+    try {
+        // Test redis_ping function
+        print("Testing redis_ping()...");
+        let ping_result = redis_ping();
+        assert_true(ping_result == "PONG", "PING should return PONG");
+        print(`✓ redis_ping(): Returned ${ping_result}`);
+
+        // Test redis_set and redis_get functions
+        print("Testing redis_set() and redis_get()...");
+        let test_key = "rhai_test_key";
+        let test_value = "Hello from Rhai test";
+
+        // Set a value
+        let set_result = redis_set(test_key, test_value);
+        assert_true(set_result, "SET operation should succeed");
+        print(`✓ redis_set(): Successfully set key ${test_key}`);
+
+        // Get the value back
+        let get_result = redis_get(test_key);
+        assert_true(get_result == test_value, "GET should return the value we set");
+        print(`✓ redis_get(): Successfully retrieved value for key ${test_key}`);
+
+        // Clean up
+        redis_del(test_key);
+
+        print("--- Redis Connection Tests completed successfully ---");
+        passed += 1;
+    } catch(err) {
+        print(`!!! Error in Redis Connection Tests: ${err}`);
+        failed += 1;
+    }
+
+    // Test 2: Redis Operations
+    print("\n--- Running Redis Operations Tests ---");
+    try {
+        // Test prefix for all keys to avoid conflicts
+        let prefix = "rhai_test_";
+
+        // Test redis_hset and redis_hget functions
+        print("Testing redis_hset() and redis_hget()...");
+        let hash_key = prefix + "hash";
+        let field = "field1";
+        let value = "value1";
+
+        // Set hash field
+        let hset_result = redis_hset(hash_key, field, value);
+        assert_true(hset_result, "HSET operation should succeed");
+        print(`✓ redis_hset(): Successfully set field in hash ${hash_key}`);
+
+        // Get hash field
+        let hget_result = redis_hget(hash_key, field);
+        assert_true(hget_result == value, "HGET should return the value we set");
+        print(`✓ redis_hget(): Successfully retrieved value from hash ${hash_key}`);
+
+        // Clean up
+        redis_del(hash_key);
+
+        print("--- Redis Operations Tests completed successfully ---");
+        passed += 1;
+    } catch(err) {
+        print(`!!! Error in Redis Operations Tests: ${err}`);
+        failed += 1;
+    }
+}
+
+print("\n=== Test Summary ===");
+print(`Passed: ${passed}`);
+print(`Failed: ${failed}`);
+print(`Skipped: ${skipped}`);
+print(`Total: ${passed + failed + skipped}`);
+
+if failed == 0 {
+    if skipped > 0 {
+        print("\n⚠️ All tests skipped or passed!");
+    } else {
+        print("\n✅ All tests passed!");
+    }
+} else {
+    print("\n❌ Some tests failed!");
+}
+
+// Return the number of failed tests (0 means success)
+failed;