Create initial pr_template for SDKs

Author: ncanumalla-splunk

.github/PULL_REQUEST_TEMPLATE/pr_template.md

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+## Description of PR
+
+Provide the **context and motivation** for this PR. 
+Briefly explain the **type of changes** (bug fix, feature request, doc update, etc.) made in this PR. Provide reference to issue # fixed, if applicable.
+
+Describe the approach to the solution, the changes made, and any resulting change in behavior or impact to the user.
+
+## Testing the changes
+
+Please ensure tests are added for your changes.
+Include details of **types of tests** written for the changes in the PR and any **test setup and configuration** required to run the tests.
+Mention the **versions of the SDK, language runtime, OS and details of Splunk deployment** used in testing.
+
+## Documentation
+
+Please ensure **comments** are added for your changes and any **relevant docs** (readme, reference docs, etc.) are updated.
+Include any references to documentation related to the changes.
+
+## Dependencies and other resources
+
+Provide references to PRs or things **dependent on this change** and any relevant PRs or resources like style guides and tools used in this PR.