chore: rename the project to ghglance

The Marketplace rejects ghstats as an action name, so the repo, Go module,
binary, and action share the name ghglance instead. The demo workflow keeps
reading the existing GHSTATS_TOKEN repo secret.

.github/workflows/demo.yml

@@ -27,8 +27,8 @@ jobs:
           go-version: "1.26"
           cache: true
 
-      - name: Build ghstats
-        run: go build -trimpath -ldflags="-s -w" -o ghstats .
+      - name: Build ghglance
+        run: go build -trimpath -ldflags="-s -w" -o ghglance .
 
       - name: Render every card for every theme
         env:
@@ -36,7 +36,7 @@ jobs:
         run: |
           rm -rf demo
           mkdir -p demo
-          ./ghstats \
+          ./ghglance \
             -user "${{ github.repository_owner }}" \
             -themes all \
             -tz Asia/Saigon \
@@ -49,11 +49,11 @@ jobs:
           OWNER: ${{ github.repository_owner }}
           REPO: ${{ github.repository }}
         run: |
-          themes=$(./ghstats -list-themes)
+          themes=$(./ghglance -list-themes)
 
           # Lightweight index so readers don't have to load ~975 images at once.
           {
-            echo "# ghstats demo gallery"
+            echo "# ghglance demo gallery"
             echo
             echo "Every card rendered for [\`$OWNER\`](https://github.com/$OWNER) in every supported theme. Click a theme to open its gallery page — each page embeds 16 SVGs, so only the theme you're reviewing is fetched."
             echo
@@ -87,7 +87,7 @@ jobs:
               printf '</tr>\n'
             }
             {
-              printf '# ghstats — %s\n\n' "$theme"
+              printf '# ghglance — %s\n\n' "$theme"
               printf '[← back to index](../README.md)\n\n'
               printf 'Rendered for [`%s`](https://github.com/%s). 16 SVGs laid out to ' "$OWNER" "$OWNER"
               printf 'match the author profile README table.\n\n'