chore: argocd app create output states whether app exists

[danielhelfand]

Closes #9969

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[codecov]

Codecov Report

Merging #9984 (21726e3) into master (99a889c) will decrease coverage by 0.06%.
The diff coverage is 51.85%.

@@            Coverage Diff             @@
##           master    #9984      +/-   ##
==========================================
- Coverage   45.96%   45.89%   -0.07%     
==========================================
  Files         227      227              
  Lines       27276    27353      +77     
==========================================
+ Hits        12538    12555      +17     
- Misses      13036    13095      +59     
- Partials     1702     1703       +1     

Impacted Files	Coverage Δ
server/application/application.go	31.46% <ø> (ø)
cmd/argocd/commands/app.go	20.62% <51.85%> (+0.62%)	⬆️
util/grpc/useragent.go	45.83% <0.00%> (-10.42%)	⬇️
server/rbacpolicy/rbacpolicy.go	82.35% <0.00%> (-2.43%)	⬇️
server/application/websocket.go	7.54% <0.00%> (-0.46%)	⬇️
pkg/apiclient/grpcproxy.go	0.00% <0.00%> (ø)
...is/applicationset/v1alpha1/applicationset_types.go	34.69% <0.00%> (+2.55%)	⬆️
server/logout/logout.go	84.37% <0.00%> (+6.59%)	⬆️

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[crenshaw-dev]

Merging master will fix the readthedocs failure.

[crenshaw-dev]

Brilliant, thanks @danielhelfand!