Make package pip-installable via wheels

WHEELS.md

@@ -0,0 +1,35 @@
+# Wheel Update Reference
+
+Two wheels are hosted on Nextcloud and installed via `pip install -r requirements.txt`:
+
+| Wheel | Type | Source |
+|---|---|---|
+| `heeps-X.Y.Z-py3-none-any.whl` | pure Python | this repo |
+| `pyproper3-X.Y.Z-cpABC-cpABC-linux_x86_64.whl` | C extensions (platform-specific) | SourceForge zip |
+
+---
+
+## Update the HEEPS wheel
+
+```bash
+# 1. Bump version in heeps/__init__.py and pyproject.toml
+# 2. Rebuild
+python -m build --wheel --outdir ~/wheels/ /home/gorban/github/HEEPS
+# 3. Upload ~/wheels/heeps-X.Y.Z-py3-none-any.whl to Nextcloud
+# 4. Update the heeps line in requirements.txt with the new share URL
+```
+
+## Update the PyPROPER wheel
+
+```bash
+# 1. Download new zip from https://sourceforge.net/projects/proper-library/files/
+# 2. Extract and build
+unzip proper_vX.Y.Z_python.zip -d /tmp/proper_build
+cd /tmp/proper_build/proper_vX.Y.Z_python
+python -m build --wheel --outdir ~/wheels/
+# 3. Upload ~/wheels/pyproper3-X.Y.Z-*.whl to Nextcloud
+# 4. Update the pyproper line in requirements.txt with the new share URL
+```
+
+> **Note:** The PyPROPER wheel is tied to a specific Python version and Linux architecture
+> (e.g. `cp312-cp312-linux_x86_64`). Rebuild on each target platform if needed.

heeps/__init__.py

@@ -1,6 +1,6 @@
 from __future__ import (absolute_import)
 
-__version__ = "1.0.0"
+__version__ = "1.1.0"
 
 from . import config
 from . import wavefront

heeps/util/__init__.py

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+from __future__ import absolute_import

pyproject.toml

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+[build-system]
+requires = ["setuptools>=61", "wheel"]
+build-backend = "setuptools.build_meta"
+
+[project]
+name = "heeps"
+version = "1.1.0"
+description = "High-contrast End-to-End Performance Simulator for the ELT"
+requires-python = ">=3.12"
+dependencies = [
+    "numpy",
+    "astropy",
+    "scipy",
+    "matplotlib",
+    "pandas",
+    "ipywidgets",
+    "requests",
+    "beautifulsoup4",
+    "packaging",
+    "scikit-image",
+    "ipython",
+    "vip_hci",
+]
+
+[tool.setuptools.packages.find]
+where = ["."]
+include = ["heeps*"]
+
+[tool.setuptools.package-data]
+"heeps" = ["**/*"]

requirements.txt

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+# requirements.txt
+https://dox.uliege.be/s/4p94sAmtQbSELSG/download/heeps-1.1.0-py3-none-any.whl  # heeps wheel
+https://dox.uliege.be/s/HJK44BRNex62iaf/download/pyproper3-3.3.3-cp312-cp312-linux_x86_64.whl  # pyproper wheel