docs: add OTinstaller as an install option

[Sushant-69x]

Issue # (none, docs-only change)

Changes Proposed

• Add an "Install with OTinstaller (Linux)" subsection to the Quick start in README.md, right after "Local setup".
• The section says it's third-party and sends install problems to the OTinstaller tracker, not to you.

Explanation of Changes

Hi! I'm Sushant, one of the developers of OTinstaller, an open-source CLI that installs OSINT tools into separate virtualenvs and runs them by name. TorBot is in its registry, so this adds a short note for people who already use it.

• It installs the torbot PyPI package, pinned to 4.3.0 (the current release), into its own virtualenv under ~/.otinstaller/tools/. Your code isn't modified or repackaged.
• otinstaller run torbot -- url:https://example.com --depth 2 --visualize table runs torbot -u https://example.com --depth 2 --visualize table. Tor setup is unchanged, so --disable-socks5 is still needed without a local Tor proxy.
• Output is also saved under ./results/ with a small JSON sidecar (command, timing, exit code, SHA-256).

Before opening this, I installed TorBot this way on Ubuntu 24.04 with Python 3.12 and ran it through otinstaller run to check the arguments it receives. The PR targets dev, the default branch.

If you'd rather not list third-party installers in your docs, that's completely fine, feel free to close this.

Screenshots of new feature/change

N/A (README text only)

[KingAkeem]

Looks good, appreciate you adding this! Good to go 👍