Add templates and CODEOWNERS to streamline repository workflow

Author: geoffreygarrett

.github/CODEOWNERS

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+# CODEOWNERS assigns reviewers to pull requests based on file paths - in this example,
+# you can specify multiple owners for a path using: path/ @user1 @user2
+# e.g. any changes to .github/ directory will request review from @geoffreygarrett
+.github/ @geoffreygarrett

.github/ISSUE_TEMPLATE/bug_report.md

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+---
+name: Bug Report
+about: Report a bug in the project
+title: ""
+labels: bug
+assignees: ""
+---
+
+**Describe the bug**
+A clear and concise description.
+
+**To Reproduce**
+Steps to reproduce:
+1.
+2.
+3.
+
+**Expected behavior**
+What you expected to happen.
+
+**Additional context**
+Logs, screenshots, or other info.

.github/ISSUE_TEMPLATE/feature_request.md

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+---
+name: Feature Request
+about: Suggest an idea
+title: ""
+labels: enhancement
+assignees: ""
+---
+
+**Is your feature request related to a problem?**
+Short description.
+
+**Describe the solution you’d like**
+Describe your solution.
+
+**Additional context**
+Any other relevant info.

.github/pull_request_template.md

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+**Summary**
+Brief overview of the changes.
+
+**Related Issues**
+Links (e.g. closes #123).
+
+**Proposed Changes**
+-  
+-
+
+**Checklist**
+- [ ] Tests pass locally
+- [ ] Documentation updated if needed