Add Slits with Individual blade control. Add those devices to i22

[RJCD-Diamond]

This allows slits to either controlled via x_gap / y_gap nomenclature or x_plus / x_minus. Apparently necessary on i22 and requested

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 99.11%. Comparing base (a832c86) to head (441df05).

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1655   +/-   ##
=======================================
  Coverage   99.11%   99.11%           
=======================================
  Files         327      327           
  Lines       12812    12820    +8     
=======================================
+ Hits        12699    12707    +8     
  Misses        113      113           

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[DominicOram]

Could: Did you try just adding these to the Slits and running dodal connect to see what broke? I think most of the slits on my beamlines have these PVs too and I don't see any harm in adding them across the board

[Relm-Arrowny]

This is the 2nd time we making slit blade for slits, should we think about moving it to common and standardise what it call?

dodal/src/dodal/devices/i10/slits.py

Line 9 in ea92977

class I10SlitsBlades(Slits):

[EmsArnold]

From a quick look at current the current synoptics, it seems like

x_minus: str = "X:MINUS", x_plus: str = "X:PLUS", y_minus: str = "Y:MINUS", y_plus: str = "Y:PLUS"

is most widely in use, with some other naming conventions having a few instruments using them:

• inboard/outboard/bottom/top
• ring/hall/minus/plus
• neg/pos/neg/pos

and a few with only a single instrument:

• 2/1/2/1
• nearside/offside/bottom/top
• nearside/offside/lower/upper

[DominicOram]

I'm going to get this merged as I think it's good.

This is the 2nd time we making slit blade for slits, should we think about moving it to common and standardise what it call?

From @EmsArnold comment it sounds like the de facto standard is +/- and i10 is the odd one out. It would be good if i10 could follow the same standard but I will leave you to discuss that with the scientists