Name the supported Python versions, 3.10 to 3.14

The README says 3.15 waits on skia-python, and the package lists each
supported version. requires-python keeps no upper bound, since pip on
3.15 would then quietly install an older git-sim instead.

Signed-off-by: Jacob Stopak <jacob@initialcommit.io>

Author: initialcommit-io

README.md

@@ -22,7 +22,7 @@ All graphs that appear in this readme were generated by git-sim. Click any graph
 
 ## Requirements
 
-- Python 3.10 or later, and Git
+- Python 3.10 to 3.14, and Git (Python 3.15 waits on the [skia-python](https://pypi.org/project/skia-python/) drawing library adding support)
 - Minimal Linux images also need the `libGL` and `fontconfig` system libraries
 - Animated video (`--animate`) also needs Manim: see [Installation](#installation)
 

pyproject.toml

@@ -27,6 +27,11 @@ keywords = [
 license = { text = "GPL-2.0" }
 classifiers = [
     "Programming Language :: Python :: 3",
+    "Programming Language :: Python :: 3.10",
+    "Programming Language :: Python :: 3.11",
+    "Programming Language :: Python :: 3.12",
+    "Programming Language :: Python :: 3.13",
+    "Programming Language :: Python :: 3.14",
     "License :: OSI Approved :: GNU General Public License v2 (GPLv2)",
     "Operating System :: OS Independent",
 ]