fix: handle malformed JSX tags with quotes in invalid positions

[hkdeman]

Fixes issue #49 where single quotes inside malformed JSX attributes would cause MDX parsing errors.

The preprocessMdxTags function now detects and escapes such malformed tags by wrapping them in backticks to treat them as literal text.

Example: <AccordionNo Documents'"> becomes properly escaped text

Generated with Claude Code

[jazzberry-ai]

Bug Report

Name|Severity|Example test case|Description\n---|---|---|---\nIncorrect handling of escaped backticks inside code blocks|Medium|```\n<Component \`attr\`>\n```|The isInsideCodeBlock function only counts the occurrences of ```. If a code block contains an escaped backtick (\`\`), the function will miscalculate whether the current position is inside a code block. In the example above, the malformed tag <Component \`attr\`> will be incorrectly identified as not being inside a code block. This will lead the regex to incorrectly escape the tag, resulting in double escaping (\`\`<Component \`attr\`>\`\`).

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