chore: add issue and pr templates (#328)

Author: kneekey23

.github/ISSUE_TEMPLATE/bug_report.md

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+---
+name: 🐛 Bug report
+about: Something isn't working as expected 🤔.
+labels: bug, needs-triage
+---
+
+## Description
+<!--- A clear and concise description of what the bug is -->
+
+## Context
+<!--- Help us understand your use case. How does this issue impact your application? What are you trying to accomplish? -->
+<!--- Providing context helps us come up with a solution that is most useful in the real world -->
+
+## Environment
+<!--- Include as many relevant details about the environment where the bug was discovered -->
+* AWS Swift SDK version used:
+* Operating System and version (iOS/macOS/Linux):
+* Xcode version (if applicable):
+* Swift compiler version (if applicable):
+* Swift Tools version (if applicable):
+
+## Reproduction Steps
+<!--- If possible, provide a self-contained, concise snippet of code that can be used to reproduce the issue -->
+<!--- For more complex issues provide a repo with the smallest sample that reproduces the bug -->
+<!--- Avoid including business logic or unrelated code, it makes diagnosis more difficult -->
+<!--- Include full errors, uncaught exceptions, stack traces, and relevant logs -->
+<!--- To turn on SDK logging, follow instructions here: https://github.com/awslabs/aws-sdk-swift#logging -->
+<!--- If service responses are relevant, please include wirelogs (after removing any sensitive content!) -->
+
+## Observed Behavior
+<!--- Tell us what happens instead of the expected behavior -->
+
+## Expected Behavior
+<!--- Tell us what should happen -->
+
+## Possible Solution
+<!--- Not required, but suggest a fix for the bug -->
+
+

.github/ISSUE_TEMPLATE/feature_request.md

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+---
+name: 💡 Feature Request
+about: Suggest an idea for this project
+labels: enhancement, needs-triage
+---
+
+<!--- Provide a general summary of the issue in the Title above -->
+
+<!-- Please keep this note for the community -->
+
+### Community Note
+
+* Please vote on this issue by adding a 👍 [reaction](https://blog.github.com/2016-03-10-add-reactions-to-pull-requests-issues-and-comments/) to the original issue to help the community and maintainers prioritize this request
+* Please do not leave "+1" or "me too" comments, they generate extra noise for issue followers and do not help prioritize the request
+* If you are interested in working on this issue, please leave a comment
+
+<!-- Thank you for keeping this note for the community -->
+
+
+## Describe the Feature
+<!--- A clear and concise description of the feature you are proposing -->
+
+## Is your Feature Request related to a problem?
+<!--- A description of the issue, e.g. It would be great if... -->
+
+## Proposed Solution
+<!--- Not required, but suggest how to implement the addition or change -->
+
+## Describe alternatives you've considered
+<!--- Any alternative solutions or features you've considered -->
+
+## Additional Context
+<!--- How has the lack of this feaure affected you? What are you trying to accomplish? -->
+<!--- Providing context helps us come up with a solution that is most useful in the real world -->
+
+
+- [ ] I may be able to implement this feature request

.github/pull_request_template.md

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+<!--- Provide a general summary of your changes in the Title above -->
+
+## Issue \#
+<!--- If it fixes an issue, please link to the issue here -->
+
+## Description of changes
+<!--- Why is this change required? What problem does it solve? -->
+
+## Conventional Commits
+<!--- Please use conventional commits to let us know what kind of change this is.-->
+<!--- More info can be found here: https://www.conventionalcommits.org/en/v1.0.0/-->
+
+By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.