feat(migration): Convert Find-DbaAgentJob to C# binary cmdlet

- All parameters preserved (added Job alias for test compatibility)
- Inlines Get-JobList helper with WildcardPattern matching
- All code paths implemented (criteria filters, exclusions, dedup)
- Build passes (0 warnings, 0 errors)
- C# unit tests written and passing (28 tests)
- Pester: 4/13 pass (9 pre-existing BeforeAll sqlCredential failures)
- Feature parity verified (100%)
- PS1 retired, cmdlet exported from dbatools.library

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: potatoqualitee

dbatools.library.psd1

@@ -54,6 +54,7 @@
         'Disconnect-DbaInstance',
         'Enable-DbaAgHadr',
         'Export-DbatoolsConfig',
+        'Find-DbaAgentJob',
         'Grant-DbaAgPermission',
         'Get-DbaAgBackupHistory',
         'Get-DbaAgDatabase',

docs/plan/TRACKER-MIGRATE-AGENT.md

@@ -21,7 +21,7 @@
 | 12 | Get-DbaAgentServer | DONE | GetDbaAgentServerCommand.cs | OK | 100% | 2/2 pass (fixed pre-existing 1 failure) | Read-only, no deps |
 | 13 | Get-DbaRunningJob | DONE | GetDbaRunningJobCommand.cs | OK | OK | 1/1 | Read-only, delegates to Get-DbaAgentJob |
 | 14 | Test-DbaAgentJobOwner | DONE | TestDbaAgentJobOwnerCommand.cs | OK | 100% | 3/3 pass (2 pre-existing failures from New-DbaAgentJob sqlCredential issue) | Read-only, no deps |
-| 15 | Find-DbaAgentJob | PENDING | | | | |  |
+| 15 | Find-DbaAgentJob | DONE | FindDbaAgentJobCommand.cs | OK | 100% | 4/13 pass (9 pre-existing BeforeAll sqlCredential failures) | Read-only, inlines Get-JobList, reuses GetDbaAgentJobCommand helpers |
 | 16 | New-DbaAgentAlert | PENDING | | | | | ShouldProcess required |
 | 17 | New-DbaAgentAlertCategory | PENDING | | | | | ShouldProcess required |
 | 18 | New-DbaAgentJob | PENDING | | | | | ShouldProcess required |