Added templates

Created templates for issues, feature requests, and pull requests

.github/ISSUE_TEMPLATE/bug_report.md

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+---
+name: Bug report
+about: Create a report to help us improve
+title: "[BUG]"
+labels: ''
+assignees: ''
+
+---
+
+**Describe the bug**
+A clear and concise description of what the bug is.
+
+**To Reproduce**
+Please describe the steps needed to reproduce the behavior. For example:
+1. Go to '...'
+2. Click on '....'
+3. Scroll down to '....'
+4. See error
+
+**Expected behavior**
+A clear and concise description of what you expected to happen.
+
+**Screenshots**
+If applicable, add screenshots to help explain your problem.
+
+**Additional context**
+Add any other context about the problem here.

.github/ISSUE_TEMPLATE/feature_request.md

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+---
+name: Feature request
+about: Suggest an idea for this project
+title: "[Feature Request]"
+labels: ''
+assignees: ''
+
+---
+
+**Is your feature request related to a problem? Please describe.**
+A clear and concise description of what the problem is.
+
+**Describe the solution you'd like**
+A clear and concise description of what you want to happen.
+
+**Describe alternatives you've considered**
+A clear and concise description of any alternative solutions or features you've considered.
+
+**Additional context**
+Add any other context or screenshots about the feature request here.

.github/ISSUE_TEMPLATE/pull-request-template.md

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+---
+name: Pull Request Template
+about: Describe this pull request's purpose here
+title: ''
+labels: ''
+assignees: ''
+
+---
+
+**Proposed Changes**
+Describe the big picture of your changes here to communicate the purpose of this pull request. If it fixes a bug or resolves a feature request, be sure to link to that issue.
+
+**Changes**
+What specific changes does your code introduce to Lux? Does your code modify any existing functionality in Lux? Have you added corresponding tests and documentation?
+
+**Example Output**
+Describe the expected behavior of your changes. If applicable, please include screenshots

.github/ISSUE_TEMPLATE/pull-request.md

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+---
+name: Pull request
+about: Describe this pull request's purpose here
+title: ''
+labels: ''
+assignees: ''
+
+---
+
+**Proposed Changes**
+Describe the big picture of your changes here to communicate the purpose of this pull request. If it fixes a bug or resolves a feature request, be sure to link to that issue.
+
+**Changes**
+What specific changes does your code introduce to Lux? Does your code modify any existing functionality in Lux? Have you added corresponding tests and documentation?
+
+**Example Output**
+Describe the expected behavior of your changes. If applicable, please include screenshots