[MINI-6478] Implement the interface miniAppFinishedLoading() to notify host app.

[GondiTilak]

Description

Implement the interface miniAppFinishedLoading() in the MiniApp JS SDK and js bridge.
This method should be used my the miniapps to notify the host app after it has finished loading.

Links:

https://jira.rakuten-it.com/jira/browse/MINI-6478

Checklist

• I have completed all steps in the Contribution Checklist

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 28.57143% with 5 lines in your changes are missing coverage. Please review.

Project coverage is 74.29%. Comparing base (8d5bbc7) to head (88382a9).

Files	Patch %	Lines
js-miniapp-bridge/src/common-bridge.ts	20.00%	4 Missing ⚠️
js-miniapp-sdk/src/modules/utils.ts	50.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #295      +/-   ##
==========================================
- Coverage   74.66%   74.29%   -0.37%     
==========================================
  Files          29       29              
  Lines         884      891       +7     
  Branches       66       66              
==========================================
+ Hits          660      662       +2     
- Misses        199      204       +5     
  Partials       25       25              

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[rleojoseph]

Looks ok to me. Only one small change. Also, please update ReadMe & Changelog for the same

[GondiTilak]

Looks ok to me. Only one small change. Also, please update ReadMe & Changelog for the same

I have updated the change log and read me for the SDK.

[sonarcloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
No data about Coverage
16.4% Duplication on New Code

See analysis details on SonarCloud