feat: add build:test script and improve documentation code blocks

- Added a new script `build:test` to generate test cases from documentation code examples.
- Enhanced documentation files by ensuring proper code block formatting and adding missing closing backticks.
- Updated various markdown files to include new code blocks and fixed formatting issues.

scripts/fix-docs.js

@@ -0,0 +1,73 @@
+import fs from 'node:fs'
+import path from 'node:path'
+import { glob } from 'glob'
+
+const docsDir = path.resolve('packages/artplayer-vitepress/docs')
+
+function fixMarkdownFile(filePath) {
+  const content = fs.readFileSync(filePath, 'utf-8')
+  const lines = content.split('\n')
+  const fixedLines = []
+  let inCodeBlock = false
+  let fixes = 0
+
+  for (let i = 0; i < lines.length; i++) {
+    const line = lines[i]
+
+    // Check if entering a code block
+    if (line.startsWith('```') && !inCodeBlock) {
+      inCodeBlock = true
+      fixedLines.push(line)
+      continue
+    }
+
+    // Check if properly exiting a code block
+    if (line.startsWith('```') && inCodeBlock) {
+      inCodeBlock = false
+      fixedLines.push(line)
+      continue
+    }
+
+    // Check if we hit a heading while still in a code block (missing ```)
+    if (inCodeBlock && line.startsWith('## ')) {
+      // Add the missing closing ```
+      fixedLines.push('```')
+      fixedLines.push('')
+      inCodeBlock = false
+      fixes++
+    }
+
+    // Check if we hit ::: (admonition) while still in a code block
+    if (inCodeBlock && line.startsWith(':::')) {
+      fixedLines.push('```')
+      fixedLines.push('')
+      inCodeBlock = false
+      fixes++
+    }
+
+    fixedLines.push(line)
+  }
+
+  // If file ended while still in code block
+  if (inCodeBlock) {
+    fixedLines.push('```')
+    fixes++
+  }
+
+  if (fixes > 0) {
+    fs.writeFileSync(filePath, fixedLines.join('\n'))
+    console.log(`✅ Fixed ${fixes} code blocks in ${path.relative(docsDir, filePath)}`)
+  }
+
+  return fixes
+}
+
+// Find all markdown files
+const files = glob.sync('**/*.md', { cwd: docsDir, absolute: true })
+
+let totalFixes = 0
+for (const file of files) {
+  totalFixes += fixMarkdownFile(file)
+}
+
+console.log(`\n✨ Total: Fixed ${totalFixes} code blocks in ${files.length} files`)