chore: add pull request and issue templates

.github/ISSUE_TEMPLATE/bug.md

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+---
+name: "\U0001F41B Bug Report"
+about: Report a bug
+title: "short issue description"
+labels: bug, needs-triage
+---
+
+<!--
+description of the bug:
+-->
+
+
+
+
+### Reproduction Steps
+
+<!--
+minimal amount of code that causes the bug (if possible) or a reference.
+
+The code sample should be an SSCCE. See http://sscce.org/ for details.
+In short, provide a code sample that we can copy/paste, run and reproduce.
+-->
+
+### What did you expect to happen?
+
+<!--
+What were you trying to achieve by performing the steps above?
+-->
+
+### What actually happened?
+
+<!--
+What is the unexpected behavior you were seeing? If you got an error, paste it here.
+-->
+
+
+### Environment
+
+  - **AWS Step Functions Data Science Python SDK version  :**
+  - **Python Version:** <!-- Version of Python (run the command `python3 --version`) -->
+
+### Other
+
+<!-- e.g. detailed explanation, stack-traces, related issues, suggestions on how to fix, links for us to have context, eg. associated pull-request, stackoverflow, slack, etc -->
+
+
+
+
+--- 
+
+This is :bug: Bug Report

.github/ISSUE_TEMPLATE/doc.md

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+---
+name: "📕 Documentation Issue"
+about: Issue in the reference documentation
+title: "short issue description"
+labels: feature-request, documentation, needs-triage
+---
+
+<!--
+- want to help? submit a pull request! docs can be found here: https://github.com/aws/aws-step-functions-data-science-sdk-python/tree/main/doc
+-->
+
+<!--
+link to reference doc page:
+-->
+
+
+
+<!--
+describe your issue:
+-->
+
+
+
+
+
+---
+
+This is a 📕 documentation issue

.github/ISSUE_TEMPLATE/feature-request.md

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+---
+name: "\U0001F680 Feature Request"
+about: Request a new feature
+title: "short issue description"
+labels: feature-request, needs-triage
+---
+
+<!-- short description of the feature you are proposing: -->
+
+
+
+
+
+### Use Case
+
+<!-- why do you need this feature? -->
+
+
+
+
+
+### Proposed Solution
+
+<!-- Please include prototype/workaround/sketch/reference implementation: -->
+
+
+
+
+
+### Other
+
+<!-- 
+e.g. detailed explanation, stacktraces, related issues, suggestions on how to fix, 
+links for us to have context, eg. associated pull-request, stackoverflow, slack, etc
+-->
+
+
+
+
+
+* [ ] :wave: I may be able to implement this feature request
+* [ ] :warning: This feature might incur a breaking change
+
+---
+
+This is a :rocket: Feature Request

.github/pull_request_template.md

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+### Description
+
+Please include a summary of the change being made.
+
+Fixes #(issue)
+
+### Why is the change necessary?
+
+What capability does it enable? What problem does it solve?
+
+### Solution
+
+Please include an overview of the solution. Discuss trade-offs made, caveats, alternatives, etc.
+
+### Testing
+
+How was this change tested?
+
+----
+
+### Pull Request Checklist
+
+Please check all boxes (including N/A items)
+
+#### Testing
+
+- [ ] Unit tests added
+- [ ] Integration test added
+- [ ] Manual testing - why was it necessary? could it be automated?
+
+#### Documentation
+
+- [ ] __docs__: All relevant [docs](https://github.com/aws/aws-step-functions-data-science-sdk-python/tree/main/doc) updated
+- [ ] __docstrings__: All public APIs documented
+
+### Title and description
+
+- [ ] __Change type__: Title is prefixed with change type: and follows [conventional commits](https://www.conventionalcommits.org/en/v1.0.0/)
+- [ ] __References__: Indicate issues fixed via: `Fixes #xxx`
+
+----
+
+By submitting this pull request, I confirm that my contribution is made under the terms of the Apache-2.0 license.