Update README with project setup instructions

Added steps for opening, configuring, and running the project in Qt Creator.

Author: chapeullah

README.md

@@ -25,9 +25,21 @@ Requires Windows, Qt Creator, Qt 6.5 or newer, CMake 3.19 or newer, and a C++ co
 git clone https://github.com/chapeullah/coding-time-tracker.git
 ```
 
+**2. Open the project**
 
+Open CMakeLists.txt via Qt Creator.
 
+**3. Configure the project**
 
+Select a Desktop Qt 6 kit and the Debug build configuration, then click Configure Project.
+
+**4. Build and Run**
+
+Use the following Qt Creator shortcuts:
+
+- Ctrl+B — build the application
+- Ctrl+R — build and run the application
+- F5 — start debugging
 
 ## License