Consolidate workflows

This moves all GitHub Actions workflows that have the same event
triggers and are not likely ever to be wanted to have different
event triggers into a single workflow file. This is most of them.

Author: EliahKagan

.github/workflows/flake8.yml

@@ -0,0 +1,150 @@
+name: Test
+
+on: [push, pull_request]
+
+jobs:
+  pytest-conda:
+    name: pytest (conda)
+
+    strategy:
+      matrix:
+        os: [ubuntu-latest, macos-latest, windows-latest]
+        python-version: ['3.13t', '3.13', '3.12', '3.11', '3.10', '3.9', '3.8', '3.7']
+
+      fail-fast: false
+
+    runs-on: ${{ matrix.os }}
+
+    defaults:
+      run:
+        shell: bash -l {0}
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Substitute Python version
+        run: |
+          perl -i -spwe 's/^ *- python=\K.+$/$pyver/' -- \
+              -pyver=${{ matrix.python-version }} environment.yml
+
+      - name: Set up micromamba
+        uses: mamba-org/setup-micromamba@v1
+        with:
+          environment-file: environment.yml
+
+      - name: Run all tests
+        run: pytest --doctest-modules
+        timeout-minutes: 2
+
+  pytest-pipenv-lock:
+    name: pytest (Pipfile.lock)
+
+    strategy:
+      matrix:
+        os: [ubuntu-latest, macos-latest, windows-latest]
+
+      fail-fast: false
+
+    runs-on: ${{ matrix.os }}
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Set up Python
+        uses: actions/setup-python@v5
+        with:
+          python-version: 3.11
+
+      - name: Upgrade PyPA packages
+        run: python -m pip install -U pip setuptools wheel
+
+      - name: Install pipenv
+        run: pip install pipenv
+
+      - name: Install project with all dependencies
+        run: pipenv install -d
+
+      - name: Run all tests
+        run: pipenv run pytest --doctest-modules
+        timeout-minutes: 2
+
+  pytest-pipenv:
+    name: pytest (Pipfile)
+
+    strategy:
+      matrix:
+        os: [ubuntu-latest, macos-latest, windows-latest]
+        python-version: ['3.13t', '3.13', '3.12', '3.11', '3.10', '3.9', '3.8', '3.7']
+
+      fail-fast: false
+
+    runs-on: ${{ matrix.os }}
+
+    defaults:
+      run:
+        shell: bash
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Remove Pipfile.lock
+        run: rm Pipfile.lock
+
+      - name: Drop full Python version
+        run: |
+          perl -i -nwe 'print unless /^python_full_version = "[^"]+"$/' Pipfile
+
+      - name: Substitute Python version
+        run: |
+          perl -i -spwe 's/^python_version = "\K[^"]+(?="$)/$pyver/' -- \
+              -pyver=${{ matrix.python-version }} Pipfile
+
+      - name: Set up Python
+        uses: actions/setup-python@v5
+        with:
+          python-version: ${{ matrix.python-version }}
+
+      - name: Upgrade PyPA packages
+        run: python -m pip install -U pip setuptools wheel
+
+      - name: Install pipenv
+        run: pip install pipenv
+
+      - name: Install project with all dependencies
+        run: pipenv install -d
+
+      - name: Run all tests
+        run: pipenv run pytest --doctest-modules
+        timeout-minutes: 2
+
+  lint:
+    name: Lint (flake8)
+
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Check out source repository
+        uses: actions/checkout@v4
+
+      - name: Set up Python environment
+        uses: actions/setup-python@v5
+        with:
+          python-version: "3.11"
+
+      - name: flake8 Lint
+        uses: py-actions/flake8@v2
+
+  shellcheck:
+    name: ShellCheck
+
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Check out source repository
+        uses: actions/checkout@v4
+
+      - name: Analyze shell scripts
+        uses: bewuethr/shellcheck-action@v2