Add SFML project with Paddle class and miscellaneous utilities

- Introduced `Paddle` class for player controls in the SFML project.
- Added `main.cpp` to demonstrate basic paddle movement and rendering.
- Created reusable templates (`templates.h`) and inline class (`inlines.h`) in the `misc` module.
- Defined `structs`, `enums`, `unions` in `misc/structs_enums_unions.h`.
- Updated CMake configuration for the `sfml` and `misc` modules.
- Included new assets for backgrounds, characters, enemies, and tiles.

cpp/containers/main.cpp

@@ -1,8 +1,12 @@
 #include <iostream>
 #include <vector>
+#include <list>
 
 #include "functions.h"
 
+typedef std::list<long long> LongLongList;
+typedef LongLongList::iterator LongLongListIterator;
+
 int main(int argc, const char* argv[]) {
     // C array
     int numbers[5] = {1, 2, 3, 4, 5}; // stack array
@@ -35,5 +39,31 @@ int main(int argc, const char* argv[]) {
 
     std::cout << "size of v: " << v.size() << "/" << v.capacity() << std::endl;
 
+    // list
+    std::list<int> l = {1, 2, 3, 4, 5};
+    l.push_front(0);
+    // int n = l[0]; // no random access for list
+
+    std::list<int>::iterator it;
+    for (it = l.begin(); it != l.end(); ++it) {
+        std::cout << *it << std::endl;
+    }
+
+    --it; --it;
+    std::cout << *it << std::endl;
+    l.insert(it, 100);
+    for (it = l.begin(); it != l.end(); ++it) {
+        std::cout << *it << std::endl;
+    }
+
+    --it; --it;
+    l.erase(it);
+    for (it = l.begin(); it != l.end(); ++it) {
+        std::cout << *it << std::endl;
+    }
+
+    LongLongList ll = {1, 2, 3, 4, 5};
+    LongLongListIterator it2;
+
     return 0;
 }