ENH: support for ND arithmetical operations for Function. (#810)

* ENH: support for ND arithmetical operations for Function.

* MNT: add source type enumeration to Function object.

* MNT: apply review suggestions to variable naming.

* MNT: solve Function code coverage for exceptions.

* MNT: correct CHANGELOG rebasing mistake.

Author: phmbressan

CHANGELOG.md

@@ -31,6 +31,7 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
 Attention: The newest changes should be on top -->
 
 ### Added
+- ENH: Support for ND arithmetic in Function class. [#810] (https://github.com/RocketPy-Team/RocketPy/pull/810)
 - ENH: allow users to provide custom samplers [#803](https://github.com/RocketPy-Team/RocketPy/pull/803)
 - ENH: Implement Multivariate Rejection Sampling (MRS) [#738] (https://github.com/RocketPy-Team/RocketPy/pull/738) 
 - ENH: Create a rocketpy file to store flight simulations [#800](https://github.com/RocketPy-Team/RocketPy/pull/800)