Add dodal describe that will give the docstrings of what's on the beamline

[DominicOram]

Fixes #1831

Requires #1829 to be merged first

Note for old ophyd devices this seems to actually try and connect and fail. I think we leave as is given that we should be off ophyd soon

Instructions to reviewer on how to test:

1. Run dodal describe i03
2. Confirm information for every device is printed (where available)

Checks for reviewer

• Would the PR title make sense to a scientist on a set of release notes
• If a new device has been added does it follow the standards
• If changing the API for a pre-existing device, ensure that any beamlines using this device have updated their Bluesky plans accordingly
• Have the connection tests for the relevant beamline(s) been run via dodal connect ${BEAMLINE}

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 99.06%. Comparing base (405e437) to head (c42e2f8).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1833   +/-   ##
=======================================
  Coverage   99.05%   99.06%           
=======================================
  Files         289      289           
  Lines       11030    11079   +49     
=======================================
+ Hits        10926    10975   +49     
  Misses        104      104           

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[oliwenmandiamond]

Would it be good to have a line break between each device doc? e.g something like

************************

or

----------------------------

Feel the output could get cluttered and hard to know where a device doc ends?
We could make it an optional flag e.g --line-break, -lb

dodal describe iXX -lb

[tpoliaw]

There's room for improvement in the information the factories offer but this is a useful command as it is so worth merging and updating later if/when we can.

[DominicOram]

Would it be good to have a line break between each device doc?

Yes, I agree, I have added. I think having it configurable is overkill though.