modify plugin structure

Signed-off-by: Dmytro Stanchiev <git@dmytros.dev>

.opencode/INSTALL.md

@@ -0,0 +1,43 @@
+# Installing Ralph Loop for OpenCode
+
+## Installation
+
+Add the plugin to the `plugin` array in your `opencode.json`:
+
+```json
+{
+  "plugin": ["opencode-plugin-ralph-loop"]
+}
+```
+
+If you install directly from git instead of a registry, use your git URL in the same array entry.
+
+Restart OpenCode after updating the config.
+
+## Usage
+
+This plugin registers these commands:
+
+- `/ralph-loop`
+- `/ulw-loop`
+- `/cancel-ralph`
+
+Example:
+
+```text
+/ralph-loop "Implement the feature completely and stop only when done"
+```
+
+## Configuration
+
+User config:
+
+- `~/.config/opencode/ralph-loop.json`
+- `~/.config/opencode/ralph-loop.jsonc`
+
+Project config:
+
+- `.opencode/ralph-loop.json`
+- `.opencode/ralph-loop.jsonc`
+
+Project config overrides user config.