chore: Add README for examples folder (#301)

Author: Feriixu

examples/README.md

@@ -0,0 +1,21 @@
+# Examples
+
+This directory contains examples of how to use `egui_dock`.
+
+To run an example, use the following command from the project root:
+
+```bash
+cargo run --example <example_name>
+```
+
+Replace `<example_name>` with the name of the example file without the `.rs` extension.
+
+## List of Examples
+
+- [`hello`](hello.rs): A comprehensive demo of `egui_dock` features, including a style editor and various dock configurations.
+- [`simple`](simple.rs): A minimal example showing how to set up a basic dock with a few tabs.
+- [`tab_add`](tab_add.rs): Shows how to implement a custom "add tab" button and handle it in the `update` loop.
+- [`tab_add_popup`](tab_add_popup.rs): Demonstrates how to use a popup menu for adding different types of tabs.
+- [`save_load_dock_state`](save_load_dock_state.rs): Shows how to persist the dock layout to a JSON file and load it back.
+- [`text_editor`](text_editor.rs): A practical example of a text editor with multiple open buffers as tabs.
+- [`reject_windows`](reject_windows.rs): Demonstrates the ability of tabs to either allow or reject being moved into separate windows.