feat(latex): revamp LaTeX devcontainer, setup docker bake

Signed-off-by: John Muchovej <[email protected]>

.github/workflows/containers-latex.yaml

@@ -0,0 +1,40 @@
+name: "Build and publish LaTeX devcontainer to ghcr.io"
+
+on:
+  push:
+    paths:
+      - "templates/src/latex/Dockerfile"
+      - "templates/src/latex/docker-bake.hcl"
+      - ".github/workflows/build-latex-devcontainer.yaml"
+  workflow_dispatch:
+  schedule:
+    - cron: "0 2 1 4 *"  # historically, TeXLive has been published around March
+
+jobs:
+  build-push-latex:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      packages: write
+    steps:
+      - name: "Checkout repository"
+        uses: "actions/checkout@v4"
+
+      - name: "Setup QEMU"
+        uses: "docker/setup-qemu-action@v3"
+
+      - name: "Setup Docker `buildx`"
+        uses: "docker/setup-buildx-action@v3"
+
+      - name: "Login to `ghcr.io`"
+        uses: "docker/login-action@v3"
+        with:
+          registry: "ghcr.io"
+          username: "${{ github.actor }}"
+          password: "${{ secrets.GITHUB_TOKEN }}"
+
+      - id: bake
+        uses: docker/bake-action@v5
+        with:
+          workdir: "./templates/src/latex"
+          push: true