feat: Add exp method to Extend Template

[aturker-synnada]

Description

Closes #99

What is Changed

Include the changes introduced in this PR.

• Add exp method to the extend template

Checklist:

• Tests that cover the code added.
• Corresponding changes documented.
• All tests passed.
• The code linted and styled (pre-commit run --all-files has passed).

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 86.57%. Comparing base (3ff233a) to head (73ac468).
Report is 5 commits behind head on main.

@@           Coverage Diff           @@
##             main     #100   +/-   ##
=======================================
  Coverage   86.57%   86.57%           
=======================================
  Files          61       61           
  Lines       15576    15578    +2     
=======================================
+ Hits        13485    13487    +2     
  Misses       2091     2091           

Files with missing lines	Coverage Δ
mithril/framework/common.py	96.50% <100.00%> (+<0.01%)	⬆️
mithril/framework/logical/essential_primitives.py	99.57% <100.00%> (+<0.01%)	⬆️
mithril/framework/logical/model.py	96.94% <ø> (ø)
mithril/models/models.py	88.62% <ø> (ø)
mithril/models/primitives.py	97.40% <ø> (-0.02%)	⬇️