✅ Add Salesforce LWC Test Application.

[BeltranBulbarellaDD]

Motivation

To be able to e2e test Salesforce LWC, we need a minimal application we can deploy and test on.

Changes

Creates new test app under test/apps/sf-lwc-app which contains 2 screens and several testing buttons which allow to test the rum-slim bundle against salesforce envirnments.

It is not yet hooked up into the build-apps script so for now it contains inside the folder a script to upload the changes to the engrum Salesforce Sandbox which does not expire.

Test instructions

Run the sf-lwc-app deploy script with any changes on the rum-slim bundle. Then log into the deployed application here. (Use 1Password beltran.bulbarella@datadoghq.com.engrumdev user)

Checklist

• Tested locally
• Tested on staging
• Added unit tests for this change.
• Added e2e/integration tests for this change.
• Updated documentation and/or relevant AGENTS.md file

[datadog-datadog-prod-us1]

🎉 All green!

🧪 All tests passed
❄️ No new flaky tests detected

🎯 Code Coverage (details)
• Patch Coverage: 100.00%
• Overall Coverage: 76.77% (+0.00%)

_{This comment will be updated automatically if new data arrives.
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[cit-pr-commenter-54b7da]

Bundles Sizes Evolution

📦 Bundle Name	Base Size	Local Size	𝚫	𝚫%	Status
Rum	172.40 KiB	172.40 KiB	0 B	0.00%	✅
Rum Profiler	7.88 KiB	7.88 KiB	0 B	0.00%	✅
Rum Recorder	21.22 KiB	21.22 KiB	0 B	0.00%	✅
Logs	54.82 KiB	54.82 KiB	0 B	0.00%	✅
Rum Slim	130.14 KiB	130.14 KiB	0 B	0.00%	✅
Worker	22.96 KiB	22.96 KiB	0 B	0.00%	✅