chore: move content to exampleSite

* update dev and build command

chore: move contents to exampleSite

chore: add configs to exampleSite

chore: use tailwindcss/nesting

* add postcss-import
* move imports to the top

chore: add config for theme dev

chore: add compiled css

chore: fix last updated issue

chore: dont't ignore hugo_stats.json

chore: update index page layout

exampleSite/content/docs/components/steps.md

@@ -0,0 +1,40 @@
+---
+title: Steps
+---
+
+A built-in component to display a series of steps.
+
+## Example
+
+{{< steps >}}
+
+### Step 1
+
+This is the first step.
+
+### Step 2
+
+This is the second step.
+
+### Step 3
+
+This is the third step.
+
+{{< /steps >}}
+
+
+## Usage
+
+Put Markdown h3 header within `steps` shortcode.
+
+```markdown
+{{</* steps */>}}
+### Step 1
+
+This is the first step.
+
+### Step 2
+
+This is the second step.
+{{</* /steps */>}}
+```