Improve GitHub issue templates (now with gherkin!) (#1689)

## Description

This refines our issue templates, adding more labels and gherkin where
appropriate to better capture feature requests.

## Related Issue

Fixes #N/A

## Type of change

- [ ] Bug fix (non-breaking change which fixes an issue)
- [ ] New feature (non-breaking change which adds functionality)
- [X] Other (security config, docs update, etc)

## Checklist before merging

- [N/A] Test, docs, adr added or updated as needed
- [X] [Contributor Guide
Steps](https://github.com/defenseunicorns/zarf/blob/main/CONTRIBUTING.md#developer-workflow)
followed

.github/ISSUE_TEMPLATE/bug_report.md

@@ -4,7 +4,6 @@ about: Create a report to help us improve
 title: ''
 labels: possible-bug
 assignees: ''
-
 ---
 
 ### Environment
@@ -25,3 +24,4 @@ Other:
 ### Severity/Priority
 
 ### Additional Context
+Add any other context or screenshots about the technical debt here.

.github/ISSUE_TEMPLATE/feature_request.md

@@ -2,19 +2,21 @@
 name: Feature request
 about: Suggest an idea for this project
 title: ''
-labels: ''
+labels: 'enhancement'
 assignees: ''
-
 ---
 
 ### Is your feature request related to a problem? Please describe.
 A clear and concise description of what the problem is. Ex. I'm always frustrated when [...]
 
 ### Describe the solution you'd like
-A clear and concise description of what you want to happen.
+
+- **Given** a state
+- **When** an action is taken
+- **Then** something happens
 
 ### Describe alternatives you've considered
-A clear and concise description of any alternative solutions or features you've considered.
+(optional) A clear and concise description of any alternative solutions or features you've considered.
 
 ### Additional context
 Add any other context or screenshots about the feature request here.

.github/ISSUE_TEMPLATE/tech_debt.md

@@ -4,14 +4,13 @@ about: Record something that should be investigated or refactored in the future.
 title: ''
 labels: 'tech-debt'
 assignees: ''
-
 ---
 
 ### Describe what should be investigated or refactored
 A clear and concise description of what should be changed/researched. Ex. This piece of the code is not DRY enough [...]
 
 ### Links to any relevant code
-https://github.com/defenseunicorns/zarf/blob/main/README.md?plain=1#L1
+(optional) i.e. - https://github.com/defenseunicorns/zarf/blob/main/README.md?plain=1#L1
 
 ### Additional context
 Add any other context or screenshots about the technical debt here.

.github/ISSUE_TEMPLATE/ux_test.md

@@ -1,16 +1,23 @@
-## Driving Questions ##
-*What are we hoping to validate?*
+---
+name: UX Test
+about: Record something that should be investigated to test User Experience
+title: ''
+labels: 'ux'
+assignees: ''
+---
 
+## Driving Questions
+What are we hoping to validate?
 
-## Testing Plan ##
-User persona:
+## Testing Plan
+User Persona:
 Sample Group:
 
 - [ ] Use Checklist for Tasks
 
-## Additional context ##
-*Screenshot or link to what needs to be tested*
+## Additional context
+Add any other context or screenshots about the UX test here.
 
-Related to issue
+Related to issue: #
 
-## Link to Test & Results ##
+## Link to Test & Results