Rename Application Lifecycle to AppTrust

[asafgabai]

• The pull request is targeting the main branch.
• The code has been validated to compile successfully by running go vet ./....
• The code has been formatted properly using go fmt ./....
• All static analysis checks passed.
• All tests have passed. If this feature is not already covered by the tests, new tests have been added.
• All integration tests have passed locally as they cannot be automated yet.
• All changes are detailed at the description. if not already covered at JFrog Documentation, new documentation have been added.

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Changed mentions of Application and Application Lifecycle to AppTrust.
Changed the app command to at (still commented out).
Package renames.

[github-actions]

Unit Tests Results

56 tests  ±0   56 ✅ ±0   0s ⏱️ ±0s
22 suites ±0    0 💤 ±0 
 1 files   ±0    0 ❌ ±0 

Results for commit 2f10d8a. ± Comparison against base commit 589111b.

This pull request removes 56 and adds 56 tests. Note that renamed tests count towards both.

github.com/jfrog/jfrog-cli-application/application/app ‑ TestGetApplicationService
github.com/jfrog/jfrog-cli-application/application/app ‑ TestGetConfig
github.com/jfrog/jfrog-cli-application/application/app ‑ TestGetSystemService
github.com/jfrog/jfrog-cli-application/application/app ‑ TestGetVersionService
github.com/jfrog/jfrog-cli-application/application/app ‑ TestNewAppContext
github.com/jfrog/jfrog-cli-application/application/commands/application ‑ TestCreateAppCommand_Error
github.com/jfrog/jfrog-cli-application/application/commands/application ‑ TestCreateAppCommand_Run
github.com/jfrog/jfrog-cli-application/application/commands/application ‑ TestCreateAppCommand_WrongNumberOfArguments
github.com/jfrog/jfrog-cli-application/application/commands/application ‑ TestDeleteAppCommand_Run
github.com/jfrog/jfrog-cli-application/application/commands/application ‑ TestDeleteAppCommand_Run_Error
…

github.com/jfrog/jfrog-cli-application/apptrust/app ‑ TestGetApplicationService
github.com/jfrog/jfrog-cli-application/apptrust/app ‑ TestGetConfig
github.com/jfrog/jfrog-cli-application/apptrust/app ‑ TestGetSystemService
github.com/jfrog/jfrog-cli-application/apptrust/app ‑ TestGetVersionService
github.com/jfrog/jfrog-cli-application/apptrust/app ‑ TestNewAppContext
github.com/jfrog/jfrog-cli-application/apptrust/commands/application ‑ TestCreateAppCommand_Error
github.com/jfrog/jfrog-cli-application/apptrust/commands/application ‑ TestCreateAppCommand_Run
github.com/jfrog/jfrog-cli-application/apptrust/commands/application ‑ TestCreateAppCommand_WrongNumberOfArguments
github.com/jfrog/jfrog-cli-application/apptrust/commands/application ‑ TestDeleteAppCommand_Run
github.com/jfrog/jfrog-cli-application/apptrust/commands/application ‑ TestDeleteAppCommand_Run_Error
…

[github-actions]

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