Changelog tool enhancement (track in long term)

[msyyc]

Tasks

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1. [changelog][code_report] support to generate code report for DPG model #34497
   Mgmt Mgmt-EngSys +2
   
2. [changelog] support breaking detection for client signature #35530
   Mgmt-EngSys +1
   
3. [breaking_changes_tracker] support to detect new Model generated from Typespec #35799
   Mgmt +1
   
4. [changelog] adopt breaking_change_tracker in pipeline #35800
   Mgmt +1
   
5. Permit users to choose latest preview version or latest stable version in pypi to compare #36371
   breaking-changes-tool +1
   
6. Skip breaking change detection in release pipeline #36370
   breaking-changes-tool +1
   
7. [breaking change detector] doesn't work well for multiapi package of Mgmt SDK #36755
   breaking-changes-tool +1
   
8. [breaking chagne detector] report item could be more concise #36763
   breaking-changes-tool +1
   
9. [breaking change detector] ignore rule doesn't work when generate changelog #36968
   P0 breaking-changes-tool +2
   
10. [breaking change detector][bug] duplicated item in changelog #36973
    breaking-changes-tool bug +2
    
11. [breaking change detector] distinguish Enum and Model in changelog #37171
    breaking-changes-tool +1
    
12. [breaking change detector] optimize changelog template #37173
    +0
13. [bct] Changelog support for new enums #36082
    breaking-changes-tool +1
    
14. [changelog] detect type change of model property #35514
    Mgmt Mgmt-EngSys feature-request +3
    
15. [breaking change detector] change log report optimization for default value change #37040
    breaking-changes-tool +1
    
16. [breaking change detector] optimization for changelog about renaming breakings #37249
    breaking-changes-tool +1