⚙️ Prepare v3 release: module path, version window, 3.0.0

Bump the Hugo module path to /v3, adopt a rolling latest-4 Hugo
version window (bot keeps it sliding), document new opt-in params,
and set package version to 3.0.0.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

.github/workflows/hugo-version-update.yml

@@ -34,7 +34,13 @@ jobs:
         if: steps.git-check.outputs.modified == 'true'
         run: |
           cat release-versions/hugo-latest.txt | \
-          while read version; do sed -i'' -E "s/(max = \")[0-9]+\.[0-9]+\.[0-9]+(\")/\1${version#v}\2/g" config.toml; done
+          while read version; do \
+            v="${version#v}"; \
+            minor="$(echo "$v" | cut -d. -f2)"; \
+            min_minor="$((minor - 3))"; \
+            sed -i'' -E "s/(max = \")[0-9]+\.[0-9]+\.[0-9]+(\")/\1${v}\2/g" config.toml; \
+            sed -i'' -E "s/(min = \")[0-9]+\.[0-9]+\.[0-9]+(\")/\10.${min_minor}.0\2/g" config.toml; \
+          done
 
       - name: Create Pull Request
         if: steps.git-check.outputs.modified == 'true'

.github/workflows/pages.yml

@@ -30,7 +30,7 @@ jobs:
   build:
     runs-on: ubuntu-latest
     env:
-      HUGO_VERSION: 0.102.3
+      HUGO_VERSION: 0.165.0
     steps:
       - name: Install Hugo CLI
         run: |