feat: support for large in-app messages

[Shahroz16]

closes: MBL-547: Bug: Large in-app messages not getting delivered

changes:

• Make JS post request for sending is message payload rather than query params
• Persistent messages are now added to shownMessageQueueIds only after dismissal, aligning with how we handle in-app message viewed logs in our middleware today

[github-actions[bot]]

# Sample app builds 📱 Below you will find the list of the latest versions of the sample apps. It's recommended to always download the latest builds of the sample apps to accurately test the pull request. ---

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 18.33333% with 49 lines in your changes missing coverage. Please review.

Project coverage is 51.78%. Comparing base (8b30804) to head (fb1fa71). Report is 19 commits behind head on main.

Files with missing lines	Patch %	Lines
...inginapp/gist/presentation/engine/EngineWebView.kt	0.00%	33 Missing :warning:
.../messaginginapp/state/InAppMessagingMiddlewares.kt	28.57%	3 Missing and 2 partials :warning:
...stomer/messaginginapp/state/InAppMessageReducer.kt	63.63%	2 Missing and 2 partials :warning:
...tomer/messaginginapp/state/InAppMessagingAction.kt	33.33%	1 Missing and 3 partials :warning:
...io/customer/messaginginapp/gist/GistEnvironment.kt	0.00%	2 Missing :warning:
...tomer/messaginginapp/gist/presentation/GistView.kt	0.00%	1 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #456 +/- ## ============================================ + Coverage 41.98% 51.78% +9.79% - Complexity 259 290 +31 ============================================ Files 99 96 -3 Lines 2320 2584 +264 Branches 344 355 +11 ============================================ + Hits 974 1338 +364 + Misses 1247 1138 -109 - Partials 99 108 +9 ```

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[github-actions[bot]]

Build available to test Version: gist-web-rendering-update-SNAPSHOT Repository: https://s01.oss.sonatype.org/content/repositories/snapshots/

[github-actions[bot]]

📏 SDK Binary Size Comparison Report

No changes detected in SDK binary size ✅

[github-actions[bot]]

• java_layout: gist-web-rendering-update (1730906469)

[github-actions[bot]]

• kotlin_compose: gist-web-rendering-update (1730906488)

[github-actions[bot]]

• java_layout: gist-web-rendering-update (1731436949)

[github-actions[bot]]

• kotlin_compose: gist-web-rendering-update (1731436961)