Move devices to tickit-devices repo

[abbiemery]

This will move the functional devices from tickit to the tickit-devices repo.

I have left the example devices and the source and sink in here, as there are generic and a guide to using the framework.

See also: https://github.com/dls-controls/tickit-devices/pull/41

[codecov[bot]]

Codecov Report

Merging #107 (cc1ddaa) into master (14d9471) will decrease coverage by 3.92%. The diff coverage is n/a.

@@            Coverage Diff             @@
##           master     #107      +/-   ##
==========================================
- Coverage   97.79%   93.87%   -3.92%     
==========================================
  Files          70       44      -26     
  Lines        2179     1127    -1052     
==========================================
- Hits         2131     1058    -1073     
- Misses         48       69      +21     

Impacted Files	Coverage Δ
src/tickit/__main__.py	0.00% <0.00%> (-100.00%)	:arrow_down:
src/tickit/adapters/epicsadapter/ioc_manager.py	50.00% <0.00%> (-50.00%)	:arrow_down:
src/tickit/adapters/composed.py	60.00% <0.00%> (-30.00%)	:arrow_down:
src/tickit/adapters/epicsadapter/adapter.py	87.75% <0.00%> (-12.25%)	:arrow_down:
src/tickit/core/management/schedulers/master.py	88.88% <0.00%> (-11.12%)	:arrow_down:
src/tickit/devices/sink.py	94.11% <0.00%> (-5.89%)	:arrow_down:
src/tickit/core/typedefs.py	89.74% <0.00%> (-5.13%)	:arrow_down:
src/tickit/devices/source.py	95.45% <0.00%> (-4.55%)	:arrow_down:
src/tickit/core/management/ticker.py	96.15% <0.00%> (-3.85%)	:arrow_down:
src/tickit/adapters/servers/tcp.py	97.43% <0.00%> (-2.57%)	:arrow_down:

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[abbiemery]

fixes #85