Create RESET.md

Author: mythz

docs/RESET.md

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+### Reset Configuration
+
+You can reset the default configuration files used by `llms.py`. This is useful if your local configuration files (`~/.llms/llms.json`, `~/.llms/providers.json`, `~/.llms/providers-extra.json`) become corrupted or if you want to start fresh with the factory defaults.
+
+#### `--reset`
+
+View the available reset options:
+
+```bash
+llms --reset
+```
+Output:
+```text
+Available resets:
+  config - Reset ~/.llms/llms.json to default
+  providers - Reset ~/.llms/providers.json and ~/.llms/providers-extra.json to default
+  all - Reset all configuration
+```
+
+#### `--reset config`
+
+Resets your `~/.llms/llms.json` file back to the original default structure without affecting your providers configuration.
+
+```bash
+llms --reset config
+```
+
+#### `--reset providers`
+
+Resets the `~/.llms/providers.json` and `~/.llms/providers-extra.json` files by downloading the latest defaults from the official repository, and automatically fetches updates. 
+
+```bash
+llms --reset providers
+```
+
+#### `--reset all`
+
+Performs both configuration and providers resets simultaneously.
+
+```bash
+llms --reset all
+```