Complete migration from requirements.txt to pyproject.toml

Remove all requirements*.txt files and complete the migration to modern
Python packaging with pyproject.toml as the single source of truth.

Changes:

1. pyproject.toml:
   - Add furo>=2024.1.29 to dev dependencies for Sphinx theme

2. setup.py:
   - Simplify to minimal shim that defers to pyproject.toml
   - Remove code that read from requirements*.txt files
   - Keep only environment variable setup (LMDB_FORCE_CFFI, etc.)
   - Modern setuptools reads all metadata from pyproject.toml

3. GitHub Actions workflows:
   - deploy-docs.yml: Replace 'pip install -r requirements-dev.txt' with 'pip install -e .[dev]'
   - deploy-wheels.yml: Replace 'pip install -r requirements-dev.txt' with 'pip install -e .[dev]'
   - test-management.yml: Replace requirements files with 'pip install -e .[dev,dev-latest]'

4. Remove files:
   - requirements-dev.txt (now in [project.optional-dependencies] dev)
   - requirements-latest.txt (now in [project.optional-dependencies] dev-latest)
   - requirements-min.txt (no longer used)
   - requirements-pinned.txt (no longer used)
   - requirements.txt (dependencies now in [project] dependencies)

Installation:
- Standard: pip install .
- Development: pip install -e .[dev]
- Latest from GitHub: pip install -e .[dev,dev-latest]
- Local editable: just install-dev-local cpy311

Benefits:
- Single source of truth for all package metadata
- Modern PEP 517/518/621 compliant packaging
- Simpler maintenance (no duplicate dependency lists)
- Better tool support (modern pip, build, twine)

Supersedes commit 0f598dd

Author: oberstet

.github/workflows/deploy-docs.yml

@@ -76,7 +76,7 @@ jobs:
     - name: Install Python package dependencies
       run: |
         python -m pip install --upgrade pip
-        pip install -r requirements-dev.txt
+        pip install -e .[dev]
 
     - name: Build and deploy docs
       run: |

.github/workflows/deploy-wheels.yml

@@ -80,7 +80,7 @@ jobs:
     - name: Install Python package dependencies
       run: |
         python -m pip install --upgrade pip
-        pip install -r requirements-dev.txt
+        pip install -e .[dev]
 
     - name: Build and deploy wheels
       run: |

.github/workflows/test-management.yml

@@ -59,12 +59,7 @@ jobs:
     - name: Install Python package dependencies
       run: |
         python -m pip install --upgrade pip setuptools
-        pip install -r requirements-dev.txt
-
-    - name: Install Crossbar.io package dependencies & Crossbar.io
-      run: |
-        pip install -U -r requirements-latest.txt
-        pip install .
+        pip install -e .[dev,dev-latest]
 
     - name: Display Crossbar.io version
       run: |

pyproject.toml

@@ -146,6 +146,7 @@ dependencies = [
 dev = [
     # Documentation
     "sphinx>=6.1.3",
+    "furo>=2024.1.29",
     "sphinxcontrib-images>=0.9.4",
     "sphinxcontrib-spelling>=7.3.2",
     "pygments>=2.11.2",