feat: update README with available field type templates and customization instructions

Author: tanhongit

README.md

@@ -13,6 +13,23 @@ GitHub Project PHP is a package that helps you manage your Github projects in PH
 
 It provides a simple and easy-to-use webhooks system to get the GitHub project's actions and implement comments on all activities in the project.
 
+## Available Field Type Templates
+
+### Standard Field Types
+
+1. **text** - For simple text fields
+2. **number** - For numeric fields
+3. **date** - For date fields (formatted as Y-m-d)
+4. **single_select** - For single-select dropdowns with color support
+5. **multi_select** - For multi-select fields
+6. **checkbox** - For boolean/toggle fields
+7. **textarea** - For long text content with diff view
+8. **iteration** - For iteration/sprint fields
+9. **labels** - For label/tag fields
+10. **assignees** - For user assignment fields
+11. **milestone** - For milestone tracking
+12. **unsupported** - Fallback for unknown field types
+
 ## 📋 Requirements
 
 - PHP ^8.3
@@ -27,13 +44,74 @@ You can install this package via Composer:
 composer require cslant/github-project-php
 ```
 
+### Customizing Templates
+
+You can publish and customize the templates by running:
+
+```bash
+php artisan vendor:publish --tag=github-project-views
+```
+
+This will copy the templates to `resources/views/vendor/github-project/md/field_types/` where you can modify them.
+
 ## 🚀 Usage
 
 See the [Usage - GitHub Project PHP Documentation](https://docs.cslant.com/github-project-php/usage)
 for a list of usage.
 
 Please check and update some configurations in the documentation.
 
+### Template Variables
+
+All field type templates receive the following variables:
+
+- `$fieldName` - The display name of the field
+- `$fieldType` - The type of the field (e.g., 'text', 'number')
+- `$fromValue` - The previous value of the field
+- `$toValue` - The new value of the field
+- `$fieldData` - Raw field data from the webhook
+
+### Adding Custom Field Types
+
+To add support for a custom field type:
+
+1. Create a new template file in the `field_types` directory
+2. Name it with your field type (e.g., `custom_type.blade.php`)
+3. The template will automatically be used when a field of that type is encountered
+
+### Styling
+
+GitHub Flavored Markdown (GFM) is supported. You can use:
+
+- `**bold**` for bold text
+- `*italic*` for italic text
+- `` `code` `` for inline code
+- ```code blocks``` for multi-line code
+- [links](https://example.com) for URLs
+- HTML is also supported for more complex formatting
+
+### Best Practices
+
+1. Keep messages concise but informative
+2. Use consistent formatting
+3. Include relevant context
+4. Handle null/empty values gracefully
+5. Use emoji sparingly for visual cues
+
+### Example Custom Template
+
+Here's an example of a custom field type template:
+
+```blade
+@if($fromValue != null && $toValue != null)
+    **`{{ $fieldName }}`** changed from **`{{ $fromValue }}`** to **`{{ $toValue }}`**
+@elseif($toValue)
+    **`{{ $fieldName }}`** set to **`{{ $toValue }}`**
+@else
+    **`{{ $fieldName }}`** cleared
+@endif
+```
+
 ## 📖 Official Documentation
 
 Please see the [GitHub Project PHP Documentation](https://docs.cslant.com/github-project-php) for more