Add usage instructions

setup_script/README.md

@@ -0,0 +1,40 @@
+# egui Template copy and setup script
+
+Simple program to copy the eframe template to setup a egui application.
+
+## Installation instructions (Optional)
+
+- Clone the repository
+- In a terminal navigate into the `script_setup` folder at the root of the repo
+- run
+  ```sh
+  cargo install --path .
+  ```
+- Generate a config
+  ```sh
+  egui_template_copy --generate-config
+  ```
+- Edit the config as applicable ensuring to set the source directory to a fully qualified path so that it will work from anywhere
+
+## Setup for first run
+
+- Clone the repo to disk
+- Generate a starter config file
+  - If installed
+    ```sh
+    egui_template_copy --generate-config
+    ```
+  - If not installed
+    - Navigate to the `script_setup` folder at the root of the repo
+      ```sh
+      cargo run -- --generate-config
+      ```
+- It will tell you where the config was created, please edit the config to match your use case
+- Then run the program see built in application help for more info `-h` for quick version or `--help` for more detailed version.
+
+## Create a new project from the template
+
+- Ensure [Setup for first run](#setup-for-first-run) have been done
+  - Note where the config is located as you need to edit it for the current project.
+    If you don't know just run the generate command again it will tell you in the error message.
+- Edit the config to match your current use case