Adds cmake build support.

examples/sample_project/README.md

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+# TinyTest Example Project
+
+This is a sample project that demonstrates how to use TinyTest in a CMake project.
+
+## Prerequisites
+
+- CMake 3.14 or higher
+- C++17 compatible compiler
+- TinyTest installed (the build script will install it if needed)
+
+## Building and Running
+
+### On Linux/macOS
+
+```bash
+# Make the build script executable
+chmod +x build.sh
+
+# Run the build script
+./build.sh
+```
+
+### On Windows
+
+```batch
+build.bat
+```
+
+## How it Works
+
+1. The build script:
+   - Checks if TinyTest is installed. If not, it builds and installs it
+   - Creates a build directory
+   - Configures the project with CMake
+   - Builds the project
+   - Runs the tests with CTest
+
+2. The CMake configuration:
+   - Finds TinyTest with `find_package(TinyTest REQUIRED)`
+   - Links the example test executable against `TinyTest::tinytest`
+   - Registers the test with CTest
+
+3. The test code:
+   - Includes the TinyTest header
+   - Defines a test suite using TinyTest's API
+   - Runs the tests and reports results
+
+## Understanding the Code
+
+The main.cpp file demonstrates:
+- How to define a function to test
+- How to create test suites
+- How to define tests with expected output
+- How to execute test suites
+- How to print and interpret test results