feat: Document template

[SergeWilfried]

Feature Description

As a user I would like to be able to create reusable document templates

Use Case

No response

Proposed Solution

No response

Alternatives (optional)

No response

Additional Context

No response

Please check the boxes that apply to this feature request.

• I have searched the existing feature requests to make sure this is not a duplicate.
• I have provided a detailed description of the requested feature.
• I have explained the use case or scenario for this feature.
• I have included any relevant technical details or design suggestions.
• I understand that this is a suggestion and that there is no guarantee of implementation.

[github-actions]

🚨 Documenso Police 🚨

@SergeWilfried has 9 open issues assigned already. Consider whether this issue should be assigned to them or left open for another contributor.