Add default issue templates back

.github/ISSUE_TEMPLATE/1_Bug_report.md

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+---
+name: 🐛 Bug Report
+about: ⚠️ See below for security reports
+labels: Bug
+
+---
+
+**Symfony version(s) affected**: x.y.z
+
+**Description**
+<!-- A clear and concise description of the problem. -->
+
+**How to reproduce**
+<!-- Code and/or config needed to reproduce the problem. If it's a complex bug,
+     create a "bug reproducer" as explained in:
+     https://symfony.com/doc/current/contributing/code/reproducer.html -->
+
+**Possible Solution**
+<!--- Optional: only if you have suggestions on a fix/reason for the bug -->
+
+**Additional context**
+<!-- Optional: any other context about the problem: log messages, screenshots, etc. -->

.github/ISSUE_TEMPLATE/2_Feature_request.md

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+---
+name: 🚀 Feature Request
+about: RFC and ideas for new features and improvements
+
+---
+
+**Description**
+<!-- A clear and concise description of the new feature. -->
+
+**Example**
+<!-- A simple example of the new feature in action (include PHP code, YAML config, etc.)
+     If the new feature changes an existing feature, include a simple before/after comparison. -->

.github/ISSUE_TEMPLATE/3_Support_question.md

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+---
+name: ⛔ Support Question
+about: See https://symfony.com/support for questions about using Symfony and its components
+
+---
+
+We use GitHub issues only to discuss about Symfony bugs and new features. For
+this kind of questions about using Symfony or third-party bundles, please use
+any of the support alternatives shown in https://symfony.com/support
+
+Thanks!

.github/ISSUE_TEMPLATE/4_Documentation_issue.md

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+---
+name: ⛔ Documentation Issue
+about: See https://github.com/symfony/symfony-docs/issues for documentation issues
+
+---
+
+Symfony Documentation has its own dedicated repository. Please open your
+documentation-related issue at https://github.com/symfony/symfony-docs/issues
+
+Thanks!