RFD 133 - Connect My Computer (#27815)

* RFD 133 - Connect My Computer

* Add security section

* Add notes on how UI behaves with given version differences

* Add jentfoo to required approvers

Co-authored-by: Mike Jensen <[email protected]>

* Explain the reason why tools such as systemd are not used

* Extend the lifecycle section with PID monitoring

* Prohibit an unsupported mix of versions

* Mention security concerns earlier

* Link to ideas on reinforcing security in the future

* Do not remove role on agent removal, ensure system username is in role

* Store just a single version of the agent

* Mention using $XDG_CACHE_HOME on Linux

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Co-authored-by: Mike Jensen <[email protected]>