feat: Allow to change subject for email transcript

[KevLehman]

Proposed changes (including videos or screenshots)

Issue(s)

https://rocketchat.atlassian.net/browse/CORE-495

Steps to test or reproduce

Further comments

Allows admins to customize the Subject field of Omnichannel email transcripts via Custom email subject for transcript setting.

[changeset-bot]

🦋 Changeset detected

Latest commit: e7fa992

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 34 packages

Name	Type
@rocket.chat/meteor	Minor
@rocket.chat/i18n	Minor
@rocket.chat/mock-providers	Patch
@rocket.chat/ui-contexts	Major
@rocket.chat/web-ui-registration	Major
@rocket.chat/fuselage-ui-kit	Major
@rocket.chat/ui-client	Major
@rocket.chat/gazzodown	Major
@rocket.chat/livechat	Patch
@rocket.chat/ui-avatar	Major
@rocket.chat/ui-video-conf	Major
@rocket.chat/uikit-playground	Patch
@rocket.chat/ddp-streamer	Patch
@rocket.chat/omnichannel-transcript	Patch
@rocket.chat/core-typings	Minor
@rocket.chat/rest-typings	Minor
@rocket.chat/apps	Patch
@rocket.chat/core-services	Patch
@rocket.chat/cron	Patch
@rocket.chat/model-typings	Patch
@rocket.chat/account-service	Patch
@rocket.chat/authorization-service	Patch
@rocket.chat/presence-service	Patch
@rocket.chat/queue-worker	Patch
@rocket.chat/stream-hub-service	Patch
@rocket.chat/api-client	Patch
@rocket.chat/license	Patch
@rocket.chat/omnichannel-services	Patch
@rocket.chat/pdf-worker	Patch
@rocket.chat/presence	Patch
rocketchat-services	Patch
@rocket.chat/ddp-client	Patch
@rocket.chat/models	Patch
@rocket.chat/instance-status	Patch

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[codecov]

Codecov Report

Attention: Patch coverage is 53.33333% with 42 lines in your changes missing coverage. Please review.

Project coverage is 55.45%. Comparing base (05db8aa) to head (e7fa992).

Additional details and impacted files

@@             Coverage Diff             @@
##           develop   #32792      +/-   ##
===========================================
- Coverage    55.50%   55.45%   -0.05%     
===========================================
  Files         2637     2638       +1     
  Lines        57289    57378      +89     
  Branches     11859    11881      +22     
===========================================
+ Hits         31797    31819      +22     
- Misses       22801    22861      +60     
- Partials      2691     2698       +7     

Flag	Coverage Δ
e2e	54.01% <50.00%> (-0.09%)	⬇️
unit	72.22% <53.40%> (-0.12%)	⬇️

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