iac: messaging: kickoff

[noahehall]

• add kafka and update shell-init/kafka.sh

# @see https://kafka.apache.org/quickstart
# TODO: this will only work on apple + brew install
## and updating it via brew fkn breaks shiz, so be careful
## TODO: check in one of the config files if something is pointing to kafka/3.2.0/
### ^ it should now be pointing to kafka/3.2.1/
# copypasta some of these
## https://gist.github.com/sahilsk/d2a6ec384f5f2333e3fef40a581a97e1
## https://github.com/lensesio/kafka-cheat-sheet
## and definitely this: https://medium.com/@TimvanBaarsen/apache-kafka-cli-commands-cheat-sheet-a6f06eac01b