Added instructions for building examples

The bulk of the instructions were generated using GitHub copilot which were tested and edited manually by me.

examples/README.md

@@ -0,0 +1,132 @@
+# Building the Examples
+
+This guide describes how to build and run the examples in this project.
+
+---
+
+## 1. Prerequisites
+
+- **CMake** (3.25 or newer recommended)
+- **C Compiler with Wasm32-target support** (GCC, Clang, or MSVC)
+- **Specific SDKs or Libraries** for some examples:
+    - [Playdate SDK](https://play.date/dev/) for Playdate examples
+    - Raylib, Sokol, stb, termbox2: fetched automatically by CMake
+
+---
+
+## 2. Clone the Repository
+
+```sh
+git clone https://github.com/nicbarker/clay.git
+cd clay
+```
+
+---
+
+## 3. Build All Examples
+
+To build all examples (except Playdate by default):
+
+```sh
+cmake -DCLAY_INCLUDE_ALL_EXAMPLES=ON -B cmake-build-debug
+cmake --build cmake-build-debug
+```
+
+---
+
+## 4. Build Specific Example Sets
+
+You can selectively enable examples:
+
+- **Raylib Examples:**  
+  `-DCLAY_INCLUDE_RAYLIB_EXAMPLES=ON`
+- **SDL2 Example:**  
+  `-DCLAY_INCLUDE_SDL2_EXAMPLES=ON`
+- **Sokol Examples:**  
+  `-DCLAY_INCLUDE_SOKOL_EXAMPLES=ON`
+- **Terminal Examples:**  
+  `-DCLAY_INCLUDE_DEMOS=ON`
+
+Example (for Raylib only):
+
+```sh
+cmake -DCLAY_INCLUDE_RAYLIB_EXAMPLES=ON -B cmake-build-raylib
+cmake --build cmake-build-raylib
+```
+
+---
+
+## 5. Building the Playdate Example
+
+**Requires the [Playdate SDK](https://play.date/dev/) to be installed.**
+
+To build for the Playdate simulator:
+
+```sh
+cmake -DCLAY_INCLUDE_PLAYDATE_EXAMPLES=ON -B cmake-build-playdate
+cmake --build cmake-build-playdate
+```
+
+The output `.pdx` file will be:
+```
+examples/playdate-project-example/clay_playdate_example.pdx
+```
+You can open this file using the Playdate simulator.
+
+**To build for Playdate hardware:**  
+Replace `/path/to/PlaydateSDK` with your Playdate SDK path.
+
+```sh
+cmake -DTOOLCHAIN=armgcc \
+      -DCMAKE_TOOLCHAIN_FILE=/path/to/PlaydateSDK/C_API/buildsupport/arm.cmake \
+      -DCLAY_INCLUDE_ALL_EXAMPLES=OFF \
+      -DCLAY_INCLUDE_PLAYDATE_EXAMPLES=ON \
+      -B cmake-build-release
+cmake --build cmake-build-release
+```
+
+---
+
+## 6. Building the Web Example (WASM)
+
+To build the official website demo as a WebAssembly app:
+
+```sh
+cd examples/clay-official-website
+./build.sh
+```
+
+> [!WARNING]
+> If you are on Mac OS X and see the following error:
+> ```logs
+> error: unable to create target: 'No available targets are compatible with triple "wasm32"'
+> ```
+> ... then you may need to install `llvm` using homebrew and add it to your PATH, resulting in it being used instead of `clang` which comes bundled with Mac OS X (which does not support WASM). An alternative is using `emscripten` but this requires modifying the `build.sh` script.
+
+Resulting files are found in the `./build/clay` subfolder:
+- `build/clay/index.html`
+- `build/clay/index.wasm`
+
+In order to view the page correctly, you will need to serve the `build` folder via a webserver, and then navigate to `index.html` in a web browser.
+
+Using vscode, open the `build` directory in own's workspace then use the Live Preview extension.
+
+---
+
+## 7. Running Examples
+
+After building, executables are found in `cmake-build-*` directories or in their respective subfolders.  
+Run them directly, e.g.:
+
+```sh
+./cmake-build-debug/examples/introducing-clay-video-demo/clay_examples_introducing_clay_video_demo
+```
+
+---
+
+## Note
+
+- Many examples automatically fetch dependencies using CMake's `FetchContent` – no manual installs needed for Raylib, Sokol, stb, or termbox2.
+- For example-specific instructions, check the README files inside each `examples/` folder.
+
+---