Switch docs hosting to developmentseed domain

Workflow from another project:

```yaml
name: Publish docs via GitHub Pages

on:
push:
branches:
- main

jobs:
build:
name: Deploy docs
runs-on: ubuntu-latest
steps:
- name: Checkout main
uses: actions/checkout@v6

- name: Install uv
uses: astral-sh/setup-uv@v7
with:
version: "0.9.*"
enable-cache: true

- name: Deploy docs
run: uv run --group docs mkdocs gh-deploy --force
```