feat: add ability to script aos loads

[twilson63]

#!/bin/bash

TEST_CONSOLE_PROC=$(aos --new --echo) # <- Returns only the new process ID -- maybe if we add a --quiet flag
TEST_TOKEN_PROC=$(aos --new --echo --load-blueprint token --eval 'Balances = {$TEST_CONSOLE_PROC=1000}')
TEST_APP_PROC=$(aos --new --echo --load app.lua --eval 'Token = $TEST_TOKEN_PROC')
aos $TEST_CONSOLE_PROC --eval 'Token = $TEST_TOKEN_PROC; App = $TEST_APP_PROC'

This introduces three new flags

--new - launch new process with no name
--echo - return output for scripting if new, returns processId
--eval - with evaluate string and if --echo return result to console in no echo show result in console