DOC: Re-platform documentation for the pixi build

Author: hjmjohnson

.github/pull_request_template.md

@@ -0,0 +1,29 @@
+## Summary
+
+<!-- One or two sentences describing what this PR does and why. -->
+
+## Type of Change
+
+- [ ] Bug fix
+- [ ] New feature / enhancement
+- [ ] Refactor / cleanup
+- [ ] Docs / CI only
+
+## Checklist
+
+- [ ] Pre-commit hooks pass locally (`pre-commit run --all-files`)
+- [ ] Tested wheel build on affected platform(s) (Linux / macOS / Windows)
+- [ ] Docs updated if behavior changed (`docs/`)
+- [ ] Commit messages use ITK prefixes (`BUG:`, `COMP:`, `DOC:`, `ENH:`, `PERF:`, `STYLE:`)
+
+## Platform(s) Tested
+
+<!-- Check all that apply, or note "untested" where applicable. -->
+- [ ] Linux x86_64 (manylinux)
+- [ ] Linux aarch64 (manylinux)
+- [ ] macOS arm64
+- [ ] Windows x86_64
+
+## Related Issues
+
+<!-- Closes #... -->

.github/workflows/docs.yaml

@@ -0,0 +1,31 @@
+name: docs
+
+on:
+  pull_request:
+    paths:
+      - "docs/**"
+      - ".readthedocs.yml"
+  push:
+    branches: [main]
+    paths:
+      - "docs/**"
+      - ".readthedocs.yml"
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-python@v5
+        with:
+          python-version: "3.11"
+      - name: Install dependencies
+        run: pip install -r docs/requirements-docs.txt
+      - name: Build docs
+        run: sphinx-build -W --keep-going -b html docs docs/_build/html
+      - uses: actions/upload-artifact@v4
+        if: always()
+        with:
+          name: docs-html
+          path: docs/_build/html
+          retention-days: 7

.github/workflows/pre-commit.yaml

@@ -0,0 +1,16 @@
+name: pre-commit
+
+on:
+  pull_request:
+  push:
+    branches: [main]
+
+jobs:
+  pre-commit:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-python@v5
+        with:
+          python-version: "3.11"
+      - uses: pre-commit/action@v3.0.1

.readthedocs.yml

@@ -0,0 +1,13 @@
+version: 2
+
+build:
+  os: ubuntu-22.04
+  tools:
+    python: "3.11"
+
+sphinx:
+  configuration: docs/conf.py
+
+python:
+  install:
+    - requirements: docs/requirements-docs.txt