Update Portal dev/user.clj code examples to manage reloading of code and mulog publisher

[practicalli-johnny]

Update Practicalli Clojure Portal data-inspector page with new information about using portal in REPL reloaded workflow

• manage portal open to avoid duplicates
• example function to start portal (alternative to auto-run)
• function to stop mulog tap publisher
• set reload directories to exclude dev

Relates: https://github.com/practicalli/project-templates/issues/7