refactor: adjust the loading order and output path of theme resources (#635)

* refactor: update config script handling to support dynamic target paths

* refactor: refactor the output paths of the script and style shortcodes, and add test cases

* fix: remove redundant console log in script-style-test.md and update MathJax and Mermaid plugin configurations in assets.html

apps/test/content/posts/script-style-test.md

@@ -0,0 +1,29 @@
+---
+title: Custom Script & Style Test
+date: 2025-09-16T09:57:28+08:00
+collections:
+  - Tests
+categories:
+  - Shortcodes
+tags:
+  - Script
+  - Style
+---
+
+Testing custom script and style by shortcode in FixIt theme.
+
+<!--more-->
+
+## Script
+
+{{< script >}}
+console.log('Hello FixIt!');
+{{< /script >}}
+
+See the output in the console of the developer tool.
+
+## Style
+
+{{< style "text-align:right; strong{color:#00b1ff;}" >}}
+This is a **right-aligned** paragraph.
+{{< /style >}}