Add LICENSE file and update README.md to include licensing information

LICENSE

@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2026 Punjitha (algotyrnt)
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

README.md

@@ -31,3 +31,6 @@ Cache0/
 ├── .github/            # The CI workflow
 └── README.md           # Readme File
 ```
+## License
+
+This project is licensed under the MIT License - see the [LICENSE](LICENSE) file for details.

include/cache0.hpp

@@ -1,9 +1,8 @@
-//
-//  cache0.hpp
-//  cache0
-//
-//  Created by Punjitha Bandara on 2026-01-19.
-//
+/*
+ * Cache0 - A lightweight C++ Key-Value Store
+ * Copyright (c) 2026 Punjitha (algotyrnt)
+ * Licensed under the MIT License.
+ */
 
 #ifndef CACHE0_HPP
 #define CACHE0_HPP
@@ -17,13 +16,13 @@ class Cache0 {
 private:
     std::unordered_map<std::string, std::string> store;
     const std::string filename = "cache0.db";
-    
+
     void load();
     void save();
 public:
     Cache0();  // Constructor (Loads data)
     ~Cache0(); // Destructor (Saves data)
-    
+
     void put(const std::string& key, const std::string& value);
     std::optional<std::string> get(const std::string& key);
     bool remove(const std::string& key);

src/cache0.cpp

@@ -1,9 +1,8 @@
-//
-//  cache0.cpp
-//  cache0
-//
-//  Created by Punjitha Bandara on 2026-01-19.
-//
+/*
+ * Cache0 - A lightweight C++ Key-Value Store
+ * Copyright (c) 2026 Punjitha (algotyrnt)
+ * Licensed under the MIT License.
+ */
 
 #include <iostream>
 #include "../include/cache0.hpp"
@@ -33,7 +32,7 @@ bool Cache0::remove(const std::string& key) {
 
 void Cache0::save() {
     std::ofstream file(filename);
-    
+
     if (file.is_open()) {
         for (const auto& pair : store) {
             file << pair.first << "=" << pair.second << std::endl;
@@ -52,7 +51,7 @@ void Cache0::load() {
     if (file.is_open()) {
         while (std::getline(file, line)) {
             size_t delimiterPos = line.find('=');
-            
+
             if (delimiterPos != std::string::npos) {
                 std::string key = line.substr(0, delimiterPos);
                 std::string value = line.substr(delimiterPos + 1);

src/main.cpp

@@ -1,24 +1,23 @@
-//
-//  main.cpp
-//  cache0
-//
-//  Created by Punjitha Bandara on 2026-01-19.
-//
+/*
+ * Cache0 - A lightweight C++ Key-Value Store
+ * Copyright (c) 2026 Punjitha (algotyrnt)
+ * Licensed under the MIT License.
+ */
 
 #include <iostream>
 #include "../include/cache0.hpp"
 
 int main() {
     std::cout << "[cache0] Initializing..." << std::endl;
-    
+
     Cache0 db;
-    
+
     db.put("user_id", "1024");
-    
+
     auto result = db.get("user_id");
     if (result) {
         std::cout << "[cache0] Found: " << *result << std::endl;
     }
-    
+
     return 0;
 }

test/test_cache0.cpp

@@ -1,9 +1,8 @@
-//
-//  test_cache0.cpp
-//  cache0
-//
-//  Created by Punjitha Bandara on 2026-01-20.
-//
+/*
+ * Cache0 - A lightweight C++ Key-Value Store
+ * Copyright (c) 2026 Punjitha (algotyrnt)
+ * Licensed under the MIT License.
+ */
 
 #include <iostream>
 #include <cassert>
@@ -17,24 +16,24 @@ void pass(const std::string& name) {
 void test_basic_operations() {
     {
         Cache0 db;
-        
+
         // 1. Test PUT and GET
         db.put("test_key", "123");
         auto val = db.get("test_key");
         assert(val.has_value() && "Key should exist");
         assert(*val == "123" && "Value should be 123");
-        
+
         // 2. Test UPDATE (Overwrite)
         db.put("test_key", "456");
         val = db.get("test_key");
         assert(*val == "456" && "Value should be updated to 456");
-        
+
         // 3. Test REMOVE
         db.remove("test_key");
         val = db.get("test_key");
         assert(!val.has_value() && "Key should be deleted");
     }
-    
+
     pass("Basic Operations");
 }
 
@@ -50,16 +49,16 @@ void test_persistence() {
         assert(val.has_value() && "Data should survive restart");
         assert(*val == "alive" && "Value should be preserved");
     }
-    
+
     pass("Persistence (Save/Load)");
 }
 
 int main() {
     std::cout << "Running cache0 Tests..." << std::endl;
-    
+
     test_basic_operations();
     test_persistence();
-    
+
     std::cout << "All tests passed successfully!" << std::endl;
     return 0;
 }