Adds GitHub issue templates (#7468)

Co-authored-by: Oran Agra <oran@redislabs.com>
Co-authored-by: yoav-steinberg <yoav@monfort.co.il>

.github/ISSUE_TEMPLATE/bug_report.md

@@ -0,0 +1,24 @@
+---
+name: Bug report
+about: Help us improve Redis by reporting a bug
+title: '[BUG]'
+labels: ''
+assignees: ''
+
+---
+
+**Describe the bug**
+
+A short description of the bug.
+
+**To reproduce**
+
+Steps to reproduce the behavior and/or a minimal code sample.
+
+**Expected behavior**
+
+A description of what you expected to happen.
+
+**Additional information**
+
+Any additional information that is relevant to the problem.

.github/ISSUE_TEMPLATE/crash_report.md

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+---
+name: Crash report
+about: Submit a crash report
+title: '[CRASH]'
+labels: ''
+assignees: ''
+
+---
+
+**Crash report**
+
+Paste the complete crash log between the quotes below. Please include a few lines from the log preceding the crash report to provide some context.
+
+```
+```
+
+**Aditional information**
+
+1. OS distribution and version
+2. Steps to reproduce (if any)

.github/ISSUE_TEMPLATE/feature_request.md

@@ -0,0 +1,24 @@
+---
+name: Feature request
+about: Suggest a feature for Redis
+title: '[NEW]'
+labels: ''
+assignees: ''
+
+---
+
+**The problem/use-case that the feature addresses**
+
+A description of the problem that the feature will solve, or the use-case with which the feature will be used.
+
+**Description of the feature**
+
+A description of what you want to happen.
+
+**Alternatives you've considered**
+
+Any alternative solutions or features you've considered, including references to existing open and closed feature requests in this repository.
+
+**Additional information**
+
+Any additional information that is relevant to the feature request.

.github/ISSUE_TEMPLATE/other_stuff.md

@@ -0,0 +1,8 @@
+---
+name: Other
+about: Can't find the right issue type? Use this one!
+title: ''
+labels: ''
+assignees: ''
+
+---

.github/ISSUE_TEMPLATE/question.md

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+---
+name: Question
+about: Ask the Redis developers
+title: '[QUESTION]'
+labels: ''
+assignees: ''
+
+---
+
+Please keep in mind that this issue tracker should be used for reporting bugs or proposing improvements to the Redis server.
+
+Generally, questions about using Redis should be directed to the [community](https://redis.io/community):
+
+* [the mailing list](https://groups.google.com/forum/#!forum/redis-db)
+* [the `redis` tag at StackOverflow](http://stackoverflow.com/questions/tagged/redis)
+* [/r/redis subreddit](http://www.reddit.com/r/redis)
+* [the irc channel #redis](http://webchat.freenode.net/?channels=redis) on freenode
+
+It is also possible that your question was already asked here, so please do a quick issues search before submitting. Lastly, if your question is about one of Redis' [clients](https://redis.io/clients), you may to contact your client's developers for help.
+
+That said, please feel free to replace all this with your question :)