.github: issues and pr templates and labeler workflow (#2414)

Closes #2405

.github/ISSUE_TEMPLATE/bug-report.yml

@@ -0,0 +1,60 @@
+name: Bug Report
+description: Report a bug you've found.
+labels: bug
+body:
+- type: textarea
+  id: version_of_this
+  attributes:
+    label: Ebitengine Version
+  validations:
+    required: true
+- type: dropdown
+  id: os
+  attributes:
+    label: Operating System
+    description: Which Operating System was the bug on?
+    options:
+      - Windows
+      - macOS
+      - Linux
+      - FreeBSD
+      - OpenBSD
+      - Android
+      - iOS
+      - Nintendo Switch
+      - Xbox
+      - Web Browsers
+  validations:
+    required: true
+- type: textarea
+  id: version_of_lang
+  attributes:
+    label: Go Version
+  validations:
+    required: true
+- type: textarea
+  id: repro_steps
+  attributes:
+    label: What were you doing (steps to reproduce the bug)?
+  validations:
+    required: true
+- type: textarea
+  id: actual_result
+  attributes:
+    label: What actually happened as a result?
+  validations:
+    required: true
+- type: textarea
+  id: expected_result
+  attributes:
+    label: What did you expect to happen?
+  validations:
+    required: true
+- type: textarea
+  id: stacktrace
+  attributes:
+    label: If you have a stack trace, please add it here.
+- type: textarea
+  id: additional
+  attributes:
+    label: Anything else you feel useful to add?

.github/ISSUE_TEMPLATE/feature-request.yml

@@ -0,0 +1,16 @@
+name: Feature Request
+description: Provide details about a feature you'd like to see.
+labels: feature
+body:
+- type: textarea
+  id: what
+  attributes:
+    label: What feature would you like to be added?
+  validations:
+    required: true
+- type: textarea
+  id: why
+  attributes:
+    label: Why is this needed?
+  validations:
+    required: true

.github/ISSUE_TEMPLATE/security-vulnerability.yml

@@ -0,0 +1,14 @@
+name: Security Vulnerability
+description: Provide details about a security vulnerability.
+labels: security
+body:
+- type: textarea
+  id: what
+  attributes:
+    label: What vulnerability have you discovered? Include any relevant details like a CVE.
+  validations:
+    required: true
+- type: textarea
+  id: why
+  attributes:
+    label: What remediation steps are known, if any.

.github/PULL_REQUEST_TEMPLATE.md

@@ -0,0 +1,13 @@
+<!--
+Thanks for sending a pull request!
+If this is your first time, please read the contributor guidelines:
+https://github.com/hajimehoshi/ebiten/blob/main/CONTRIBUTING.md
+Also please adhere to our Code of Conduct:
+https://github.com/hajimehoshi/ebiten/blob/main/CODE_OF_CONDUCT.md
+-->
+# What issue is this addressing?
+<!-- Closes #<issue number> -->
+## What _type_ of issue is this addressing?
+<!-- bug | feature | security -->
+## What this PR does | solves
+<!-- Please be as descriptive as possible -->

.github/workflows/issue-labeler.yml

@@ -0,0 +1,15 @@
+name: "Issue Labeler"
+on:
+  issues:
+    types: [opened, edited]
+
+jobs:
+  triage:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: github/issue-labeler@6ca237433dbbb8e475241b7f38f4600d9e296c57 # v2.5
+      with:
+        repo-token: "${{ secrets.GITHUB_TOKEN }}"
+        configuration-path: .github/workflows/issue-labeler/config.yml
+        not-before: "2022-10-27T17:00:00+11:00"
+        enable-versioned-regex: 0

.github/workflows/issue-labeler/config.yml

@@ -0,0 +1,20 @@
+os:windows:
+- '\n### Operating System\n\nWindows\n'
+os:macos:
+- '\n### Operating System\n\nmacOS\n'
+os:linux:
+- '\n### Operating System\n\nLinux\n'
+os:freebsd:
+- '\n### Operating System\n\nFreeBSD\n'
+os:openbsd:
+- '\n### Operating System\n\nOpenBSD\n'
+os:android:
+- '\n### Operating System\n\nAndroid\n'
+os:ios:
+- '\n### Operating System\n\niOS\n'
+os:nintendoswitch:
+- '\n### Operating System\n\nNintendo Switch\n'
+os:xbox:
+- '\n### Operating System\n\nXbox\n'
+os:js:
+- '\n### Operating System\n\nWeb Browsers\n'