add github issue templates; update existing pull request template

.github/ISSUE_TEMPLATE/BUG_REPORT.md

@@ -0,0 +1,38 @@
+---
+name: "\U0001F41B Bug Report"
+about: You want to report a reproducible bug or regression in turtle-cli.
+title: ''
+labels: 'bug'
+assignees: ''
+
+---
+
+<!-- Thanks for helping expo! Before you submit your issue, please make sure you followed our checklist and check the appropriate boxes by putting an x in the [ ]: [x] -->
+
+### New Issue Checklist
+
+- [ ] Updated turtle-cli to the latest version (`yarn global add turtle-cli` or `npm install --global turtle-cli`).
+- [ ] I read the [Contribution Guidelines](https://github.com/expo/turtle/blob/master/CONTRIBUTING.md).
+- [ ] I read [docs.expo.io](https://docs.expo.io) (Managed Workflow > Distributing Your App).
+- [ ] I searched for [existing GitHub issues](https://github.com/expo/turtle/issues).
+- [ ] **I enclosed the complete output when running turtle, including the stack trace and command used.**
+
+### Issue Description
+<!-- Please include what's happening, expected behavior, and any relevant code samples -->
+
+##### Command executed
+<!-- The command you executed on the command line that resulted in an error -->
+
+##### Complete output when running turtle, including the stack trace and command used
+
+<details>
+  <pre> [PUT LOGS HERE] </pre>
+</details>
+
+### Environment
+
+<!-- Please run `expo diagnostics` and copy the output below. This will help us help you. -->
+
+<details>
+  <pre> [PUT OUTPUT HERE] </pre>
+</details>

.github/ISSUE_TEMPLATE/FEATURE_REQUEST.md

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+---
+name: "\U0001F64B Feature Request"
+about: Want us to add something to turtle-cli?
+title: ''
+labels: 'feature-request'
+assignees: ''
+
+---
+
+### Feature Request
+
+#### Motivation Behind Feature
+<!-- Why should this feature be implemented? What problem does it solve? -->
+
+#### Feature Description
+<!-- Describe your feature request in detail -->
+<!-- Please provide any code examples or screenshots of what this feature would look like -->
+<!-- Are there any drawbacks? Will this break anything for existing users? -->
+
+#### Alternatives or Workarounds
+<!-- Describe alternatives or workarounds you are currently using -->
+<!-- Are there ways to do this with existing commands? -->

.github/ISSUE_TEMPLATE/QUESTION.md

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+---
+name: "\U00002753 Questions and discussions"
+about: You have a question about turtle-cli or want to discuss some aspects of turtle-cli.
+title: ''
+labels: 'question'
+assignees: ''
+
+---
+
+### Question Checklist
+
+- [ ] I read the [Contribution Guidelines](https://github.com/expo/turtle/blob/master/CONTRIBUTING.md).
+- [ ] I read [docs.expo.io](https://docs.expo.io) (Managed Workflow > Distributing Your App).
+- [ ] I searched for [existing GitHub issues](https://github.com/expo/turtle/issues).
+
+### Question Subject
+<!-- What command do you have a question about? -->
+<!-- Is this a question about documentation? -->
+
+#### Question Description
+<!-- Please include expected behavior and any relevant code samples with your question if possible -->

.github/PULL_REQUEST_TEMPLATE

@@ -1,11 +0,0 @@
-# Why
-
-Please describe the motivation for this PR, and link to relevant GitHub issues, forums posts, or feature requests.
-
-# How
-
-How did you build this feature or fix this bug and why?
-
-# Test Plan
-
-Please describe how you tested this change and how a reviewer could reproduce your test, especially if this PR does not include automated tests! If possible, please also provide terminal output and/or screenshots demonstrating your test/reproduction.

.github/PULL_REQUEST_TEMPLATE.md

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+<!-- Thanks for contributing to _turtle_! Before you submit your pull request, please make sure to check the following boxes by putting an x in the [ ] (don't: [x ], [ x], do: [x]) -->
+
+### Checklist
+- [ ] I've read the [Contribution Guidelines](https://github.com/expo/turtle/blob/master/CONTRIBUTING.md).
+- [ ] I've updated the [CHANGELOG](https://github.com/expo/turtle/blob/master/CHANGELOG.md) if necessary.
+- [ ] I've ensured the unit and smoke tests are still passing - either by running `yarn test:unit` and `yarn test:smoke:[ios|android]` or by checking the appropriate CircleCI builds' statuses.
+- [ ] **I've manually tested whether the changes I made work as expected.**
+
+### Motivation and Context
+<!-- Why is this change required? What problem does it solve? -->
+<!-- If it fixes an open issue, please link to the issue here. -->
+
+### Description
+<!-- Describe your changes in detail -->
+<!-- Please describe in detail how you tested your changes. -->