Add the ability to insert typed signatures.
Once the signature field is placed on the document, a checkbox appears
in the document editor where the document owner can allow signers to add
typed signatures. Typed signatures are disabled by default.

## Description
Add initial French translations
<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit
- **New Features**
- Added support for the French language, enhancing accessibility for
French-speaking users.
- Introduced localized French messages for various application
functionalities, improving user experience.
- **Bug Fixes**
- Minor formatting updates in French translation files to remove
extraneous newline characters.
- **Chores**
- Updated line references in French translation files to maintain
alignment with code changes.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
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Co-authored-by: Lucas Smith <me@lucasjamessmith.me>
Co-authored-by: Crowdin Bot <support+bot@crowdin.com>
Co-authored-by: github-actions <github-actions@documenso.com>