Toml (#5115)

# Description of Changes

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Please provide a summary of the changes, including:

- What was changed
- Why the change was made
- Any challenges encountered

Closes #(issue_number)
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---

## Checklist

### General

- [ ] I have read the [Contribution
Guidelines](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/CONTRIBUTING.md)
- [ ] I have read the [Stirling-PDF Developer
Guide](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/devGuide/DeveloperGuide.md)
(if applicable)
- [ ] I have read the [How to add new languages to
Stirling-PDF](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/devGuide/HowToAddNewLanguage.md)
(if applicable)
- [ ] I have performed a self-review of my own code
- [ ] My changes generate no new warnings

### Documentation

- [ ] I have updated relevant docs on [Stirling-PDF's doc
repo](https://github.com/Stirling-Tools/Stirling-Tools.github.io/blob/main/docs/)
(if functionality has heavily changed)
- [ ] I have read the section [Add New Translation
Tags](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/devGuide/HowToAddNewLanguage.md#add-new-translation-tags)
(for new translation tags only)

### Translations (if applicable)

- [ ] I ran
[`scripts/counter_translation.py`](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/docs/counter_translation.md)

### UI Changes (if applicable)

- [ ] Screenshots or videos demonstrating the UI changes are attached
(e.g., as comments or direct attachments in the PR)

### Testing (if applicable)

- [ ] I have tested my changes locally. Refer to the [Testing
Guide](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/devGuide/DeveloperGuide.md#6-testing)
for more details.

ADDING_TOOLS.md

@@ -202,10 +202,10 @@ const [ToolName] = (props: BaseToolProps) => {
 ## 5. Add Translations
 Update translation files. **Important: Only update `en-GB` files** - other languages are handled separately.
 
-**File to update:** `frontend/public/locales/en-GB/translation.json`
+**File to update:** `frontend/public/locales/en-GB/translation.toml`
 
 **Required Translation Keys**:
-```json
+```toml
 {
   "home": {
     "[toolName]": {
@@ -251,7 +251,7 @@ Update translation files. **Important: Only update `en-GB` files** - other langu
 ```
 
 **Translation Notes:**
-- **Only update `en-GB/translation.json`** - other locale files are managed separately
+- **Only update `en-GB/translation.toml`** - other locale files are managed separately
 - Use descriptive keys that match your component's `t()` calls
 - Include tooltip translations if you created tooltip hooks
 - Add `options.*` keys if your tool has settings with descriptions