ci(builds): automated builds and deployment to pages

Use a matrix to parallelize building the docs for listed DEVFAMILY and
OS combinations. Aggregate the results to build an expected pages
artifact. Deploy the monolithic artifact to GitHub pages.

If any platform fails for any reason, the arguments and logs for that
build will be logged under a separate section of this workflow, and the
results should not be deployed.

We can't use a separate workflow for the deploy step just yet because
actions/deploy-pages does not support fetching artifacts from other
workflow runs.

Signed-off-by: Randolph Sapp <rs@ti.com>

.github/workflows/build.yml

@@ -0,0 +1,98 @@
+---
+name: "build"
+
+on:
+  push:
+    branches: [master]
+
+concurrency:
+  group: ${{ github.ref_name }}
+  cancel-in-progress: true
+
+defaults:
+  run:
+    shell: bash
+
+jobs:
+  build:
+    name: Build Linux Documents
+    runs-on: ubuntu-latest
+    container:
+      image: ghcr.io/texasinstruments/processor-sdk-doc:latest
+      options: --entrypoint /bin/bash
+    strategy:
+      matrix:
+        os: [linux]
+        device:
+          - AM335X
+          - AM437X
+          - AM57X
+          - AM62AX
+          - AM62PX
+          - AM62X
+          - AM64X
+          - AM65X
+          - AM67
+          - AM68
+          - AM69
+          - CORESDK
+          - DRA821A
+          - GEN
+          - J7200
+          - J721E
+          - J721S2
+          - J722S
+          - J742S2
+          - J784S4
+        include:
+          - os: android
+            device: AM62PX
+          - os: android
+            device: AM62X
+          - os: android
+            device: GEN
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Build ${{ matrix.device }}
+        run: |
+          make DEVFAMILY=${{ matrix.device }} OS=${{ matrix.os }} \
+          VERSION=${{ github.ref_name }}
+
+      - name: Upload artifact
+        uses: actions/upload-artifact@v4
+        with:
+          name: ${{ matrix.device }}-${{ matrix.os }}
+          path: build/
+          retention-days: 1
+
+  agregate:
+    name: Agregate build artifacts
+    runs-on: ubuntu-latest
+    needs: build
+
+    steps:
+      - name: Download all artifacts
+        uses: actions/download-artifact@v4
+        with:
+          github-token: ${{ secrets.GITHUB_TOKEN }}
+          path: build
+          merge-multiple: true
+
+      - name: Upload static files as single artifact
+        uses: actions/upload-pages-artifact@v3
+        with:
+          path: build
+
+  deploy:
+    name: Deploy
+    runs-on: ubuntu-latest
+    permissions:
+      pages: write
+      id-token: write
+
+    steps:
+      - name: Update github page deployment
+        uses: actions/deploy-pages@v4