Initial commit

As discussed and reviewed in
#98

Author: zakkak

.github/ISSUE_TEMPLATE/---bug-report.md

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+---
+name: "\U0001F41E Bug report"
+about: 'Create a report to help us improve. To report a security vulnerability, please
+  see below or the SECURITY.md file at the root of the repository. Do not open a GitHub
+  issue. '
+title: ''
+labels: bug
+assignees: ''
+
+---
+
+## Description
+A clear and concise description of what the bug is.
+
+## How To Reproduce
+Steps to reproduce the behavior:
+1. `git clone ...`
+2. `native-image ...`
+3. `mycmd ...`
+
+### Configuration:
+ - OS: [e.g. Ubuntu 18.04, Fedora 32]
+ - Architecture: [e.g. AMD64, A]
+ - Mandrel version: [e.g. 20.1.0.0.Alpha1]
+ - JDK version: [e.g. OpenJDK 11.0.8+5]
+
+## Expected behavior
+A clear and concise description of what you expected to happen.
+```
+Expected output
+```
+
+## Additional context
+Add any other context about the problem here.
+```
+Add logs and stack traces here
+```
+If applicable, add screenshots to help explain your problem.

.github/ISSUE_TEMPLATE/---feature-request.md

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+---
+name: "\U0001F9E9 Feature request"
+about: Suggest an idea for this project
+title: ''
+labels: enhancement
+assignees: ''
+
+---
+
+**Is your feature request related to a problem? Please describe.**
+A clear and concise description of what the problem is. Ex. I'm always frustrated when [...]
+
+**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/config.yml

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+blank_issues_enabled: false
+contact_links:
+  - name: Need help or have a question?
+    url: https://www.graalvm.org/slack-invitation/
+    about: Visit our slack channel.

.github/workflows/mark-stale-issues-and-prs.yml

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+name: Mark stale issues and PRs
+
+on:
+  push:
+    branches:
+    - master
+    paths:
+    - .github/workflows/**
+  schedule:
+  - cron: '0 3 * * *'
+
+jobs:
+  mark-stale-issues-and-prs:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/stale@v3
+      with:
+        repo-token: ${{ secrets.GITHUB_TOKEN }}
+        stale-issue-message: 'This issue appears to be stale because it has been open 30 days with no activity. This issue will be closed in 7 days unless `Stale` label is removed or a new comment is made.'
+        stale-pr-message: 'This PR appears to be stale because it has been open 30 days with no activity. This PR will be closed in 7 days unless `Stale` label is removed or a new comment is made.'
+        days-before-stale: 30
+        days-before-close: 7