Add Python version 3.12 (#74)

* Add Python version 3.12

Very useful for uv based jobs and tasks

* Read Python version from .python-version file in Makefile

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

* Update Makefile

---------

Co-authored-by: Claude Opus 4.5 <noreply@anthropic.com>

.python-version

@@ -0,0 +1 @@
+3.12

Makefile

@@ -1,8 +1,10 @@
 .DEFAULT_GOAL := help
 
+PYTHON_VERSION := $(shell cat .python-version)
+
 venv:
 	@curl -LsSf https://astral.sh/uv/install.sh | sh
-	@uv venv --python 3.12
+	@uv venv --python $(PYTHON_VERSION)
 
 
 .PHONY: install
@@ -22,6 +24,7 @@ jupyter: install  ## Install and start jupyter Lab
 	@uv run pip install jupyterlab
 	@uv run jupyter lab
 
+
 .PHONY: marimo
 marimo: install ## Install and start marimo
 	@uv run pip install marimo