Rename and refactor rendering module

Renamed `rendering.py` to `expressions.py`, and refactored to load the environment dynamically rather than using a static instance. Adjusted project to require Python 3.12 and updated dependencies accordingly, including the addition of `asttokens` and `icecream`.

project_forge/rendering.py → project_forge/rendering/expressions.py

@@ -1,10 +1,8 @@
-"""Tools for rendering templates and template strings."""
+"""Render template expressions."""
 
 from typing import MutableMapping, Optional, Union
 
-from minijinja import Environment
-
-ENV = Environment()
+from project_forge.rendering.environment import load_environment
 
 
 def render_bool_expression(expression: Union[str, bool], context: Optional[MutableMapping] = None) -> bool:
@@ -32,4 +30,6 @@ def render_bool_expression(expression: Union[str, bool], context: Optional[Mutab
 def render_expression(expression: str, context: Optional[MutableMapping] = None) -> str:
     """Render a template expression."""
     context = context or {}
-    return ENV.render_str(expression, **context).strip()
+    env = load_environment()
+    template = env.from_string(expression)
+    return template.render(**context).strip()

pyproject.toml

@@ -14,11 +14,11 @@ classifiers = [
 keywords = ["project_forge"]
 dynamic = ["version"]
 license = { file = "LICENSE" }
-requires-python = ">=3.9"
+requires-python = ">=3.12"
 dependencies = [
     "environs>=9.3.5",
     "pydantic>=2.8.2",
-    "minijinja>=2.2.0",
+    "jinja2>=3.1.0",
     "pyyaml>=6.0.2",
     "tomlkit>=0.13.2",
     "click>=8.1.7",
@@ -43,6 +43,7 @@ Changelog = "https://github.com/callowayproject/project-forge/CHANGELOG.md"
 dev = [
     "bump-my-version",
     "generate-changelog>=0.7.6",
+    "icecream",
     "uv",
 ]
 test = [

tests/test_rendering.py → tests/test_rendering/test_expressions.py

@@ -2,7 +2,7 @@
 
 import pytest
 from pytest import param
-from project_forge.rendering import render_bool_expression
+from project_forge.rendering.expressions import render_bool_expression
 
 
 class TestRenderBoolExpression: