Add interface type annotations for template_parser

[mohamedryan]

Pull Request Title:
Add interface type annotations to template_parser for better type clarity

Description:
This pull request adds type annotations to variables that use the template_parser interface.

• Changes Introduced:
  • Added type annotations to the template_parser variable to improve type clarity and consistency.

Reason for Changes:

• Adding type annotations makes the code more readable and explicit, helping other developers understand the expected types more easily.
• Type annotations also improve the effectiveness of IDE tools and type checkers, enhancing maintainability and reducing the potential for type-related bugs.

Additional Notes:

• This change improves code quality without impacting functionality.