feat(blog): add blog index page and exclude it from processing

The changes include:
- Add new blog/index.md to display a list of blog posts
- Modify .make.sh to exclude index.md from blog processing

This change improves blog organization by:
- Creating a dedicated landing page for all blog posts
- Preventing index.md from being processed as a regular blog post

Signed-off-by: Chun-Yu Lee (Mat) <[email protected]>

.make.sh

@@ -144,7 +144,7 @@ function process_blogs() {
 	tmpd=$(mktemp -d)
 	(
 		cd $ROOT_DIR || exit
-		find blog/ -maxdepth 1 -type f -name "*.md" | sort | while read -r line; do
+		find blog/ -maxdepth 1 -type f -name "*.md" | grep -v -e "index.md" | sort | while read -r line; do
 			echo "Processing $line ..."
 			fpath="$line"
 			title=$(cat "$fpath" | remove_frontmatter | head -1 | grep -e "^#\s\+" | sed -e "s/^#\s*//g")

blog/index.md

@@ -0,0 +1,14 @@
+---
+layout: default
+title: Blog
+---
+# Blog
+
+<ul>
+  {% for post in site.categories.blog %}
+    <li>
+      <span>{{ post.date | date: "%Y-%m-%d" }}</span>
+      <a href="{{ post.url }}">{{ post.title }}</a>
+    </li>
+  {% endfor %}
+</ul>