chore(ci): improve language TOML check output with fixer guidance (#5638)

# Description of Changes

This pull request enhances the language file difference reporting in
`.github/scripts/check_language_toml.py` by providing clearer guidance
on how to resolve translation key mismatches. The most important changes
are:

**Improved translation key reporting and remediation instructions:**

* When extra keys are detected, the report now suggests the exact
command (`translation_merger.py remove-unused`) to remove them and
provides a direct example for the user.
* When missing keys are found, the report now suggests the exact command
(`translation_merger.py add-missing`) to add them and provides a direct
example for the user.
* For any missing or extra keys, a reference link to the relevant
documentation section is included to help users understand and resolve
the issues.

---

## 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.

.github/scripts/check_language_toml.py

@@ -259,10 +259,21 @@ def check_for_differences(reference_file, file_list, branch, actor):
                 report.append(
                     f"    - **_Extra keys in `{locale_dir}/{basename_current_file}`_**: `{missing_keys_str}` that are not present in **_`{basename_reference_file}`_**."
                 )
+                report.append("")
+                report.append("    Use the following command to remove them:")
+                report.append(f"    `python scripts/translations/translation_merger.py {locale_dir} remove-unused`")
+                report.append("")
             if extra_keys_list:
                 report.append(
                     f"    - **_Missing keys in `{locale_dir}/{basename_current_file}`_**: `{extra_keys_str}` that are not present in **_`{basename_reference_file}`_**."
                 )
+                report.append("")
+                report.append("    Use the following command to add them:")
+                report.append(f"    `python scripts/translations/translation_merger.py {locale_dir} add-missing`")
+                report.append("")
+
+            if missing_keys_list or extra_keys_list:
+                report.append("    See: https://github.com/Stirling-Tools/Stirling-PDF/tree/main/scripts/translations#2-translation_mergerpy")
         else:
             report.append("2. **Test Status:** ✅ **_Passed_**")