Draft: Remove notifications

Remove notifications

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What this MR is adding?

• Remove notifications handling from beekeepy
• Add app_status_probe to quickly interact with new app_status_api api
• Bit of refactor

TODO:

• clean branches in hive and test-tools
• verify if new implementation works in clive
• add mechanism to close detached beekeeper basing only on process list

assigned to @kmochocki

changed the description

added Doing enhancement labels