chore: add fnox.zsh with a comment

Author: dkarter

config/zsh/fnox.zsh

@@ -0,0 +1,6 @@
+# I'm not sure yet I want to activate, because it exposes secrets in env vars,
+# which then agents can read. I'm thinking it might be better to use `fnox
+# exec` only for commands that need it. This will also reduce 1password prompts
+# for every new shell.
+# I can potentially use mise aliases to make it easier to use fnox exec.
+# eval "$(fnox activate zsh)"