MVP Correction Implemented

Add implementation for the basic set of spectrum components:

Primary
-------
- Phase Space
- Fermi Function

Corrections
-----------

- Atomic:
  - Screening
  - Atomic exchange
- E/M and finite size:
  - Finite nucleus size and charge distribution
  - Radiative

pyproject.toml

@@ -4,10 +4,10 @@ build-backend = "setuptools.build_meta"
 
 [project]
 name = "beta-spectrum"
-version = "0.1.0"
+version = "0.1.1"
 description = "High-precision beta spectrum calculation for nuclear physics"
 authors = [
-    { name = "Your Name" }
+    { name = "Evgeniy Unzhakov" }
 ]
 requires-python = ">=3.10"