Replace browser scraping with Roblox API + switch output to JSON

[Curvn]

This pull request replaces the original browser-based asset checker with a Roblox Toolbox API implementation and updates the output system to JSON.

Major changes

Data collection overhaul

• Replaced Puppeteer-based scraping with Roblox Toolbox Service API
• Uses batched requests (up to 100 IDs per call) for improved performance
• Removes all browser automation dependencies

Output system update

• Replaced TXT output with structured JSON output (audio - Sorted.json)
• Added manual JSON building with proper escaping for reliability
• Prevents issues related to System.Text.Json reflection restrictions

Stability improvements

• Eliminated dependency on headless Chrome
• More reliable asset detection using API response data
• Improved handling for missing or moderated assets

Input / Output

• Input remains: audio.txt
• Output is now: audio - Sorted.json

Notes

• Only audio scanning is included in this version
• Core parsing logic for input format remains unchanged
• This is a functional rewrite of the scanning method, not just a formatting change