Switch to venv and pip setup instead of conda.

This better aligns with the max+mojo docs for installation.

README.md

@@ -15,13 +15,17 @@ does not have any awareness of Mojo source or package structure, `pytest` is ext
 
 1. Create your Mojo tests according to the manual: https://docs.modular.com/mojo/tools/testing .
 
-2. Install `pytest` and `pytest-mojo` plugin into your project
-    with `pip install git+https://github.com/guidorice/mojo-pytest.git`, or with the Conda
-    [environment.yaml](./environment.yaml) (recommended)
+2. Install `pytest` and `pytest-mojo` plugin using the [pyproject](./pyproject.toml) file:
+
     ```shell
-    # conda installation example
-    $ conda env create -f environment.yaml -p ./env
-    $ conda activate ./env
+    # (optional) create and activate a virtualenv
+    python3 -m venv venv/
+    source venv/bin/activate
+
+    # install from github
+    pip install git+https://github.com/guidorice/mojo-pytest.git
+    # or install from cloned repository
+    pip install .
 
     # verify pytest and the Mojo plugin are installed
     $ pytest --version

pyproject.toml

@@ -0,0 +1,22 @@
+[tool.poetry]
+name = "pytest-mojo"
+version = "24.4.0"
+description = "Mojo🔥 language test runner plugin for pytest. (aka pytest-mojo)"
+authors = ["Alex G Rice <alex@ricegeo.dev>"]
+license = "MIT"
+readme = "README.md"
+repository = "https://github.com/guidorice/mojo-pytest"
+packages = [
+    { include = "pytest_mojo" },
+]
+
+[tool.poetry.dependencies]
+python = "^3.11"
+pytest = "*"
+
+[build-system]
+requires = ["poetry-core"]
+build-backend = "poetry.core.masonry.api"
+
+[tool.poetry.plugins.pytest11]
+mojo = "pytest_mojo.plugin"