Vendor Tailwind and daisyUI in the repo; never reach github.com

Builds used to download the Tailwind binary and the daisyUI plugins from GitHub
releases. They are now committed in tools/tailwind/:
- the Tailwind 4.3.3 standalone binary for linux-x64, xz -9e compressed (28 MB);
- daisyui.mjs and daisyui-theme.mjs 5.7.47;
- daisyUI's llms.txt component reference;
- Tailwind's MIT license.

tools/tailwind.sh no longer touches the network. "prepare" checks every file
against its pinned sha256 and unpacks the binary into .tools/. MSBuild reruns it
only when the archive or the script changes. A build from scratch was checked
inside a network namespace with no network at all.

.gitattributes keeps the vendored files byte-exact, and Tailwind no longer scans
tools/, whose llms.txt names every daisyUI class.

Both workflows used actions/checkout, which a Gitea runner downloads from
github.com. They now git fetch the commit from this Gitea, as they already did
for SocialPub.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01LsXgEaXee4GCU1hwYgPJXw

.gitea/workflows/deploy.yml

@@ -16,9 +16,16 @@ jobs:
     name: decepub.thepra.dev
     runs-on: build
     steps:
-      - uses: actions/checkout@v4
-        with:
-          path: decePubClient
+      # A plain fetch from this Gitea rather than actions/checkout, which the runner would download from github.com.
+      - name: Check out this commit
+        env:
+          READ_TOKEN: ${{ secrets.THEPRA_READ_TOKEN }}
+        run: |
+          rm -rf decePubClient
+          git init -q decePubClient
+          git -C decePubClient -c http.extraHeader="Authorization: token $READ_TOKEN" fetch -q --depth 1 \
+            "$GITHUB_SERVER_URL/$GITHUB_REPOSITORY.git" "$GITHUB_SHA"
+          git -C decePubClient checkout -q FETCH_HEAD
 
       - name: Fetch PrivaPub's client models beside it
         env: