chore(gh): update issue template

.github/ISSUE_TEMPLATE/bug_report.yml

@@ -0,0 +1,53 @@
+name: 🐞 Bug report
+description: File a report to help us improve Cryostat.
+title: '[Bug] <title>'
+labels: [bug, needs-triage]
+
+body:
+  - type: textarea
+    attributes:
+      label: Current Behavior
+      description: A concise description of what you're experiencing.
+      placeholder: Tell us what you see!
+    validations:
+      required: true
+  - type: textarea
+    attributes:
+      label: Expected Behavior
+      description: A concise description of what you expected to happen.
+      placeholder: Tell us what you expected to see!
+    validations:
+      required: false
+  - type: textarea
+    attributes:
+      label: Steps To Reproduce
+      description: Steps to reproduce the behavior.
+      placeholder: |
+        1. In this environment...
+        2. With this config...
+        3. Run '...'
+        4. See error...
+    validations:
+      required: false
+  - type: textarea
+    attributes:
+      label: Environment
+      description: |
+        examples:
+          - **OS**: Ubuntu 20.04
+          - **Environment**: OpenShift 4.11
+          - **Version**: Cryostat 2.3.0
+      value: |
+          - OS: 
+          - Environment: 
+          - Version: 
+      render: Markdown
+    validations:
+      required: false
+  - type: textarea
+    attributes:
+      label: Anything else?
+      description: |
+        Screenshots? Links? References? Anything that will give us more context about the issue you are encountering!
+    validations:
+      required: false

.github/ISSUE_TEMPLATE/config.yml

@@ -0,0 +1,5 @@
+blank_issues_enabled: enabled
+contact_links:
+  - name: Cryostat Community Support
+    url: https://github.com/cryostatio/cryostat/discussions
+    about: Ask general questions about Cryostat here!

.github/ISSUE_TEMPLATE/feature_request.yml

@@ -0,0 +1,18 @@
+name: ✨ Feature request
+description: Improve an existing feature or add a new one.
+title: '[Request] <title>'
+labels: [feat, needs-triage]
+
+body:
+  - type: textarea
+    attributes:
+      label: Describe the feature
+      description: A clear and concise description of what the feature is. 
+      placeholder: A nice feature that I'd like to suggest...
+    validations:
+      required: true
+  - type: textarea
+    attributes:
+      label: Anything other information?
+    validations:
+      required: false

.github/pull_request_template.md

@@ -6,7 +6,9 @@
 * [ ] Resolved all conflicts, if any
 * [ ] Rebased your branch PR on top of the latest upstream `main` branch
 * [ ] Attached at least one of the following labels to the PR: `[chore, ci, docs, feat, fix, test]`
-* [ ] Signed the last commit: `git commit --amend --signoff`
+* [ ] [Signed all commits using a GPG signature](https://docs.github.com/en/authentication/managing-commit-signature-verification/about-commit-signature-verification#gpg-commit-signature-verification)
+
+**To recreate commits with GPG signature** `git fetch upstream && git rebase --force --gpg-sign upstream/main`
 _______________________________________________
 
 Fixes: #<issue number>