ci: refine workflow triggers to exclude pull requests and allow manual runs

[Harmanpreet-Microsoft]

Purpose

This pull request updates the CI workflow configuration to refine when the workflow is triggered. The main change is to explicitly add triggers for manual runs and pull requests, while ensuring that pull requests do not trigger the workflow for any branch.

Workflow trigger updates:

• .github/workflows/ci.yml: Added workflow_dispatch to allow manual triggering of the workflow.
• .github/workflows/ci.yml: Added pull_request trigger with branches-ignore: ['**'] to prevent the workflow from running on pull requests for any branch.
• ...

Does this introduce a breaking change?

• Yes
• No

How to Test

• Get the code

git clone [repo-address]
cd [repo-name]
git checkout [branch-name]
npm install

• Test the code

What to Check

Verify that the following are valid

• ...

Other Information