feat: Add witness policy management to Orb CLI

[bstasyszyn]

Added commands to the Orb CLI to update and retrieve a witness policy for an Orb domain.

closes #1286

Signed-off-by: Bob Stasyszyn Bob.Stasyszyn@securekey.com

[codecov]

Codecov Report

Merging #1297 (484b540) into main (70d59f2) will decrease coverage by 0.01%.
The diff coverage is 94.59%.

@@            Coverage Diff             @@
##             main    #1297      +/-   ##
==========================================
- Coverage   87.94%   87.93%   -0.02%     
==========================================
  Files         179      182       +3     
  Lines       17835    17925      +90     
==========================================
+ Hits        15685    15762      +77     
- Misses       1372     1382      +10     
- Partials      778      781       +3     

Impacted Files	Coverage Δ
cmd/orb-cli/policycmd/getcmd.go	91.66% <91.66%> (ø)
cmd/orb-cli/policycmd/updatecmd.go	94.44% <94.44%> (ø)
cmd/orb-cli/main.go	75.00% <100.00%> (+0.80%)	⬆️
cmd/orb-cli/policycmd/policy.go	100.00% <100.00%> (ø)
...pub/service/inbox/httpsubscriber/httpsubscriber.go	88.88% <0.00%> (-8.89%)	⬇️
cmd/orb-server/startcmd/start.go	68.01% <0.00%> (-0.20%)	⬇️
cmd/orb-server/startcmd/params.go	81.95% <0.00%> (+0.18%)	⬆️
pkg/vct/proofmonitoring/monitoring.go	80.55% <0.00%> (+2.77%)	⬆️

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