feat: Export selected room messages as JSON file

[dougfabris]

Proposed changes (including videos or screenshots)

Introduces a new option when exporting messages, allowing users to select and download a JSON file directly from the client

Issue(s)

Steps to test or reproduce

Further comments

CORE-807
CORE-808

[dionisio-bot]

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[changeset-bot]

🦋 Changeset detected

Latest commit: 68a5910

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

This PR includes changesets to release 38 packages

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

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[github-actions]

PR Preview Action v1.4.8
🚀 Deployed preview to https://RocketChat.github.io/Rocket.Chat/pr-preview/pr-34076/
on branch gh-pages at 2024-12-19 14:03 UTC

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 75.81%. Comparing base (082d3ce) to head (68a5910).
Report is 1 commits behind head on develop.

Additional details and impacted files

@@           Coverage Diff            @@
##           develop   #34076   +/-   ##
========================================
  Coverage    75.81%   75.81%           
========================================
  Files          512      512           
  Lines        22208    22208           
  Branches      5404     5404           
========================================
  Hits         16837    16837           
  Misses        4720     4720           
  Partials       651      651           

Flag	Coverage Δ
unit	75.81% <ø> (ø)

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[MarcosSpessatto]

Would it be possible to add tests?