Add templates for issues and pull requests

.github/ISSUE_TEMPLATE/bug-report.md

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+---
+name: Bug Report
+about: Create a report to help us improve
+title: ''
+labels: bug, needs triage
+assignees: ''
+
+---
+
+### Subject of the issue
+Describe your issue here.
+
+### Your environment
+* OS - 
+* Version - 
+
+### Steps to reproduce
+Tell us how to reproduce this issue. Please provide a working demo, you can use [this template](https://plnkr.co/edit/XorWgI?p=preview) as a base.
+
+### Expected behaviour
+Tell us what should happen.
+
+### Actual behaviour
+Tell us what happens instead.
+
+### Additional context
+Add any other context about the problem here.

.github/ISSUE_TEMPLATE/config.yml

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+blank_issues_enabled: true
+contact_links:
+  - name: Ask on Discord
+    url: https://discord.gg/7xgjhVAg6g
+    about: You can ask for help here!
+  - name: Want to contribute to step Helm Charts?
+    url: https://github.com/smallstep/cli/blob/master/docs/CONTRIBUTING.md
+    about: Be sure to read contributing guidelines!

.github/ISSUE_TEMPLATE/documentation-request.md

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+---
+name: Documentation Request
+about: Request documentation for a feature
+title: ''
+labels: docs, needs triage
+assignees: ''
+
+---
+
+<!---
+Tell us which feature you'd like to see documented. 
+ - Where would you like that documentation to live (command line usage output, website, github markdown on the repo)? 
+- If there are specific attributes or options you'd like to see documented, please include those in the request.
+-->

.github/ISSUE_TEMPLATE/enhancement.md

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+---
+name: Enhancement
+about: Suggest an enhancement to helm-charts
+title: ''
+labels: enhancement, needs triage
+assignees: ''
+
+---
+
+### What would you like to be added
+
+
+### Why this is needed

.github/PULL_REQUEST_TEMPLATE

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+### Description
+Please describe your pull request.
+
+💔Thank you!