feat: add issue templates for better communication

.github/ISSUE_TEMPLATE/01-bug_report.md

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+---
+name: Bug report
+about: Report a bug
+title: "[BUG][TF2/HL2]"
+labels: bug
+assignees: ''
+
+---
+
+- [ ] I have searched for similar issues in the repository
+
+<!--Feel free to edit this template to suit your needs-->
+
+**Description**
+<!--A clear and concise description of what the bug is-->
+
+**Steps To Reproduce**
+<!--Steps to reproduce the behavior-->
+
+**Expected behavior**
+<!--A clear and concise description of what you expected to happen.-->
+
+**Attachements**
+<!--If applicable, add screenshots, video, logs etc. to help explain your problem.-->
+
+**Environment information**
+<!-- Information about your system: OS, e.g. Windows 11, used compiler etc. if applicable-->
+
+**Additional context**
+<!--Add any other context about the problem here.-->

.github/ISSUE_TEMPLATE/02-feature_request.md

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+---
+name: Feature request
+about: Suggest an idea for this project
+title: "[FEAT][TF2/HL2]"
+labels: ''
+assignees: ''
+
+---
+
+**Description**
+<!--A clear and concise description of the feature request-->
+
+**Suggestion**
+<!--if you have suggestion how to implement it, or to solve a problem-->
+
+**Additional context**
+<!--Add any other context about the feature request here.-->

.github/ISSUE_TEMPLATE/03-custom.md

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+---
+name: Custom issue template
+about: When your issue doesn't fit any of the above templates
+title: ''
+labels: ''
+assignees: ''
+
+---
+
+- [ ] I have searched for similar issues in the repository
+
+<!--Feel free to edit this template to suit your needs-->
+
+**Description**
+<!--A clear and concise description of what the bug is-->
+
+**Attachements**
+<!--If applicable, add screenshots, video, logs etc. to help explain your problem.-->
+
+**Additional context**
+<!--Add any other context about the problem here.-->