Add PR, bug and feature template

.github/ISSUE_MODULES/class3.md

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+## Class 3 - To be completed only for **Class 3 defects**
+More information is needed for filling Class 3 defects, in order to be compliant with Nuclear Industry standards.
+
+### Class 3 Training Link (must be updated for GitHub)
+[Make sure you have taken this training to know how to fill Class 3 defect](https://ansys.sharepoint.com/sites/QualitySystemTraining/SitePages/Class-3-Defect-Training.aspx)
+
+### Class 3 Description
+_Enter here the description of the bug_
+
+### Suggested User Action
+_Enter here the suggested actions for avoiding the bug_
+
+### Class 3 Signoffs 
+- Report Writer : _Enter name_
+- Date (YYYY-MM-DD) : _Enter date_
+- [ ] Report Writer Signoff
+
+- Tech Reviewer : _Enter name_
+- Date (YYYY-MM-DD) : _Enter date_
+- [ ] Tech Reviewer Signoff
+
+- Doc Reviewer : _Enter name_
+- Date (YYYY-MM-DD) : _Enter date_
+- [ ] Doc Reviewer Signoff
+
+- Signing Manager : _Enter name_
+- Date (YYYY-MM-DD) : _Enter date_
+- [ ] Signing Manager Signoff
+
+- Report Poster : _Enter name_
+- Date (YYYY-MM-DD) : _Enter date_
+- Class 2 Report Number (Corporate Quality) : _Enter Number_
+- [ ] Report Poster Signoff

.github/ISSUE_TEMPLATE/bug-form.yml

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+name: Bug
+description: File a bug report with a form.
+labels: ["bug"]
+body:
+  - type: markdown
+    attributes:
+      value: |
+        Before opening a bug report, please search for the behaviour in the existing issues. 
+
+        ---
+
+        Thank you for taking the time to file a bug report. To address this bug as fast as possible, we need some information.
+  - type: dropdown
+    id: deployment_template
+    attributes:
+      label: deployment template
+      description: which deployment template are you using
+      options:
+        - rep-core
+        - rep-gateway-parallel-cluster
+        - rep-kubernetes
+        - other (please specify in the description)
+    validations:
+      required: true
+  - type: textarea
+    id: bug-description
+    attributes:
+      label: Bug description
+      description: A clear and concise description of what the bug is.  Screenshots can be used here to aid in the description.
+    validations:
+      required: true
+  - type: textarea
+    id: expected-behavior
+    attributes:
+      label: Expected Behavior
+      description: A clear and concise description of what you expected to happen.   Screenshots can be used here to aid in the description.
+    validations:
+      required: true
+  - type: textarea
+    id: steps
+    attributes:
+      label: Steps to reproduce
+      description: Which steps do we need to take to reproduce this error?  Ideally a script to reproduce the error (pyrep or cpp-client) would be provided
+  - type: textarea
+    id: logs
+    attributes:
+      label: Relevant log output
+      description: Logs or tracebacks coming from the service(s) should be attached.  Please attach the full log and not a partial.  
+      render: shell

.github/ISSUE_TEMPLATE/config.yml

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+blank_issues_enabled: true

.github/ISSUE_TEMPLATE/feature.yml

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+name: 💡 New feature
+description: Enhancement Request
+title: "Add ..."
+labels: ["enhancement"]
+assignees: [""]
+
+body:
+
+  - type: textarea
+    id: feature-description
+    attributes:
+      label: '📝 Description of the feature'
+      placeholder: Describe the feature that you want to be added
+    validations:
+      required: true
+
+  - type: textarea
+    id: implementation-description
+    attributes:
+      label: '💡 Steps for implementing the feature'
+    validations:
+      required: false
+
+  - type: textarea
+    id: references
+    attributes:
+      label: '🔗 Useful links and references'
+    validations:
+      required: false

.github/pull_request_template.md

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+# Pull Request Template
+
+## Description
+Please provide a brief description of the changes in this pull request.
+
+## Checklist
+Please complete the following checklist before submitting your pull request:
+- [ ] I have tested these changes locally and verified that they work as intended.
+- [ ] I have updated any documentation as needed to reflect these changes (if appropriate)
+- [ ] I have verified that these changes to the best of my knowledge do not introduce any security vulnerabilities.
+- [ ] Unit tests have been added (if appropriate)
+- [ ] Test-cases have been added (if appropriate)
+- [ ] Testing instructions have been added (if appropriate)