[Draft] Add store.openStoreExperience and otherApp.notifyAppInstall for BizChat in context store

[Zhitao]

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Description

Summarize the changes, including the goals and reasons for this change. Be sure to call out any technical or behavior changes that reviewers should be aware of.

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Main changes in the PR:

1. <Change 1>
2. <Change 2>

Validation

Validation performed:

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2. <Step 2>

Unit Tests added:

Unit tests are required for all changes. If no unit tests were added as part of this change, please explain why they aren't necessary.

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End-to-end tests added:

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Additional Requirements

Change file added:

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Related PRs:

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Next/remaining steps:

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• Item 1
• Item 2

Screenshots:

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Before	After
< image1 >	< image2 >