Re-consolidate workflows

They are failing to run and I don't know why.

.github/workflows/tests.yaml

@@ -10,7 +10,7 @@ on:
     # the conditions for which gh-pages are updated.
     branches: [ trunk ]
     tags:
-      - incremental-*
+      - "incremental-*"
   pull_request:
     branches: [ trunk ]
 
@@ -29,7 +29,22 @@ jobs:
     runs-on: ubuntu-24.04
 
     steps:
-    - uses: ./.github/actions/build-dist
+    - uses: actions/checkout@v4
+
+    - uses: actions/setup-python@v5
+      with:
+        python-version: "3.12"
+
+    - run: pip install build twine
+
+    - run: python3 -m build
+
+    - run: twine check dist/*.*
+
+    - uses: actions/upload-artifact@v4
+      with:
+        name: dist
+        path: dist/*.*
 
   testing:
     runs-on: ubuntu-24.04
@@ -160,3 +175,24 @@ jobs:
       with:
         name: html-report
         path: htmlcov
+
+  pypi-publish:
+    runs-on: ubuntu-24.04
+    if: startsWith(github.ref, 'refs/tags/incremental-')
+    needs: [build, testing]
+
+    environment:
+      name: release
+      url: https://pypi.org/p/incremental
+
+    permissions:
+      id-token: write
+
+    steps:
+
+    - uses: actions/download-artifact@v4
+      with:
+        name: dist
+        path: dist/
+
+    - uses: pypa/gh-action-pypi-publish@release/v1