Make Crawllama compatible with Termux (Android)

[arn-c0de]

Crawllama currently does not run on Termux (Android) due to
dependencies and system calls that are not available on ARM/Android.

Goal

Make the core functionality usable on Termux without requiring root.

Requirements

• Replace or make optional any packages that don't build on ARM
  (e.g. orjson, tiktoken, native extensions)
• Avoid readline/prompt_toolkit calls that break in Termux TTY
• Ensure setup.sh runs on Termux bash (no apt-only dependencies)
• Test basic query flow and /osint/company on Android

Out of Scope

• GUI / Streamlit interface
• Full feature parity with desktop (RAG/ChromaDB optional is fine)

Environment

• Termux on Android (ARM64)
• Python 3.11+ via pkg install python