Move version to package and mark pyproject dynamic

Add a __version__ = "2.0.0rc0" placeholder in dlclivegui/__init__.py and update pyproject.toml to use dynamic = ["version"] instead of a hardcoded version field. This makes the project metadata pull the version from the package source rather than storing it twice.

Author: C-Achard

dlclivegui/__init__.py

@@ -24,3 +24,4 @@
     "CameraConfigDialog",
     "main",
 ]
+__version__ = "2.0.0rc0"  # PLACEHOLDER

pyproject.toml

@@ -4,7 +4,6 @@ requires = [ "setuptools>=68" ]
 
 [project]
 name = "deeplabcut-live-gui"
-version = "2.0.0rc0"  # PLACEHOLDER
 description = "PySide6-based GUI to run real time pose estimation experiments with DeepLabCut"
 readme = "README.md"
 keywords = [ "deep learning", "deeplabcut", "gui", "pose estimation", "real-time" ]
@@ -22,6 +21,7 @@ classifiers = [
   "Programming Language :: Python :: 3.12",
   "Topic :: Scientific/Engineering :: Artificial Intelligence",
 ]
+dynamic = [ "version" ]  # version is set in dlclivegui/__init__.py
 dependencies = [
   "cv2-enumerate-cameras",
   "deeplabcut-live==1.1",