feat: add counter contract

contracts/counter.sylvia.sol

@@ -0,0 +1,52 @@
+// SPDX-License-Identifier: MIT
+pragma solidity ^0.8.24;
+
+// @title A contract that manages a simple numerical counter
+// @ author Sylvia Nnoruka
+// @ notice You can use this contact to increase, decrease, and reset the counter, while also emitting events to track changes
+contract Count {
+    // @ notice event for when the count increase or decrease
+    event Updated (uint count,address updatedby);
+
+    // @ notice Declared a state variable
+     uint public count = 0; 
+
+    //  @ notice wrote a function that increases the count
+     function increase()public{
+
+        // @ notice this count shouldnt increase beyound uint256
+        require (count < type(uint).max, "cannot increase beyond max uint");
+        count += 1;
+
+        // @ notice triggers the updated event
+         emit Updated (count, msg.sender);
+
+     }
+    //  @notice decreases the count by 1 and triggers the Updated event
+     function decrease()public {
+        require (count > 0, "cannot be less than 0");
+        count -= 1;
+
+        emit Updated (count, msg.sender);
+     }
+       // @notice reset the count by 0 and triggers the Updated event
+     function reset () public{
+         count = 0;
+
+         emit Updated (count, msg.sender);
+     }
+
+    //  @notice a getter function that gets the value of count
+     function getCount() public view returns(uint) {
+       return count;
+     }
+
+    // @notice  returns the maximum possible value of a uint256.
+    function getMaxUint256() public pure returns(uint){
+        unchecked{
+            return uint256(0) - 1;
+        }
+    }
+
+
+}