Enable and create github issue templates

[samperd]

As per:
https://help.github.com/en/articles/creating-issue-templates-for-your-repository

Creating issue templates for your repository
When you create issue templates for your repository using the issue template builder, they'll be available for contributors to use when they open new issues in the repository.

Suggested templates:
User Story Template Example

## User Story:
(Please describe the task or feature you are requesting)

As a <User Role>
I want <Describe Feature>
So that <Describe Goal>

## Implementation Details:
(Please include any additional details required to describe this issue)
* .
* .

## Related Issues
(Please include links to other related issues by using the #number auto link syntax)
* .

## Service Desk Issues
( Please include any links to existing service desk issues related to this issue)
* [Issue Name](http://link.to.issue)


## Business Value:
(Please select a single business value based on the MoSCoW model. Deafult: Must Have)
* [x] Must Have
* [ ] Should Have
* [ ] Could Have
* [ ] Would Like to Have

## User Story Points (Effort)
( Please estimate the number of User Story points you this this issue deserves. Default: 10)
* [ ] Unknown
* [ ] 0
* [ ] 1
* [ ] 2
* [ ] 3
* [ ] 5
* [ ] 8
* [x] 10
* [ ] 15
* [ ] 25
* [ ] 50
* [ ] 100
* [ ] Infinity