feat: use github issues/pr templates v2 (#663)

.github/ISSUE_TEMPLATE/bug-report.md

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+---
+name: Bug Report
+about: Report a bug encountered while running Nexe
+labels: bug
+
+---
+<!-- Please use this template while reporting a bug and provide as much info as possible. Not doing so may result in your bug not being addressed in a timely manner. Thanks!
+-->
+
+**What happened**:
+
+**What you expected to happen**:
+
+**How to reproduce it (as minimally and precisely as possible)**:
+
+**Anything else we need to know?**:
+
+**Environment**:
+- Platform(OS/Version):
+- Host Node Version:
+- Target Node Version:
+- Nexe version:
+- Python Version:

.github/ISSUE_TEMPLATE/feature.md

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+---
+name: Feature Request
+about: Suggest an feature request
+labels: feature
+
+---
+<!-- Please only use this template for submitting feature requests -->
+
+**What would you like to be added**:
+
+**Why is this needed**:

.github/PULL_REQUEST_TEMPLATE.md

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+**What this PR does / why we need it**:
+
+**Which issue(s) this PR fixes**:
+<!--
+*Automatically closes linked issue when PR is merged.
+Usage: `Fixes #<issue number>`, or `Fixes (paste link of issue)`.
+_If PR is about `failing-tests or flakes`, please post the related issues/tests in a comment and do not use `Fixes`_*
+-->
+Fixes #
+
+**Special notes for your reviewer**: