First release. Slim iOS simulators to run many more on one Mac.

brew install mobai-app/tap/simslim

• simslim on <udid> disables unneeded background daemons and reboots slim (~4x less memory per simulator)
• simslim off <udid> restores stock
• simslim list | profiles | status | measure

macOS + Xcode command-line tools required. Reversible, and gated by a safety allowlist.