Add deploy to Neocities workflow

.gitattributes

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+docs/* linguist-documentation=false

.github/workflows/ci.yml

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+# Author: Bret Comnes
+# License: MIT
+
+name: Deploy to neocities
+
+# only run on changes to main
+on:
+  push:
+    branches:
+      - main
+
+concurrency: # prevent concurrent deploys doing strange things
+  group: deploy-to-neocities
+  cancel-in-progress: true
+
+jobs:
+  deploy:
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v3
+    # When the dist_dir is ready, deploy it to neocities
+    - name: Deploy to neocities
+      uses: bcomnes/deploy-to-neocities@v1
+      with:
+        api_token: ${{ secrets.NEOCITIES_API_KEY }}
+        cleanup: true
+        dist_dir: docs