flake: add treefmt, reorganize flake, format using treefmt

.github/workflows/main.yml

@@ -32,17 +32,13 @@ jobs:
       - uses: DeterminateSystems/magic-nix-cache-action@main
       - uses: DeterminateSystems/flake-checker-action@main
       - name: Build with Hugo
-        run: |
-          nix develop --command bash -c "hugo \
-            --environment production \
-            --minify \
-            --baseURL '${{ steps.pages.outputs.base_url }}/'"
+        run: nix run .
       - name: Upload to GitHub Pages
         uses: actions/upload-pages-artifact@main
         with:
           path: ./public
       - name: Upload to Netim FTP
-        uses: SamKirkland/FTP-Deploy-Action@main
+        uses: SamKirkland/FTP-Deploy-Action@master
         with:
           server: ftp.netim.hosting
           username: AS12798_FTP1