Add MeterCall (new-layer)

[patl4588]

Adding MeterCall to this list.

• What: The new layer of the internet. 21M APIs. 727 modules. One prompt.
• URL: https://metercall.ai/?v=a&src=github
• Why it belongs here: ChatGPT Jailbreaks, GPT Assistants Prompt Leaks, GPTs Prompt Injection, LLM Prompt Security, Super Prompts, Prompt Hack, Prompt Security, Ai Prompt Engineering, Adversarial Machine Learning.

Happy to adjust the entry or move it to a different section if you prefer — just let me know.