chore(gh): update issue templates (cryostatio#1609)

.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

@@ -14,10 +14,10 @@ _______________________________________________
 Fixes: #<issue number>
 
 ## Description of the change:
-*This change adds allows a match expression example to be copied to the clipboard...*
+*This change allows an environment variable to be configured so that...*
 
 ## Motivation for the change:
-*This change is helpful because users may want to copy the example for easier use...*
+*This change is helpful because users may want to...*
 
 ## How to manually test:
 1. *Run CRYOSTAT_IMAGE=quay.io... sh smoketest.sh...*