Simplify and relax issue forms further

Signed-off-by: Byron Ruth <byron@nats.io>

.github/ISSUE_TEMPLATE/defect.yml

@@ -0,0 +1,47 @@
+---
+name: Defect
+description: Report a defect, such as a bug or regression.
+labels:
+  - defect
+body:
+  - type: textarea
+    id: observed
+    attributes:
+      label: Observed behavior
+      description: Describe the unexpected behavior or performance regression you are observing.
+    validations:
+      required: true
+  - type: textarea
+    id: expected
+    attributes:
+      label: Expected behavior
+      description: Describe the expected behavior or performance characteristics.
+    validations:
+      required: true
+  - type: textarea
+    id: versions
+    attributes:
+      label: Server and client version
+      description: |-
+        Provide the versions you were using when the detect was observed.
+        For the server, use `nats-server --version`, check the startup log output, or the image tag pulled from Docker.
+        For the CLI client, use `nats --version`.
+        For language-specific clients, check the version downloaded by the language dependency manager.
+    validations:
+      required: true
+  - type: textarea
+    id: environment
+    attributes:
+      label: Host environment
+      description: |-
+        Specify any relevant details about the host environment the server and/or client was running in,
+        such as operating system, CPU architecture, container runtime, etc.
+    validations:
+      required: false
+  - type: textarea
+    id: steps
+    attributes:
+      label: Steps to reproduce
+      description: Provide as many concrete steps to reproduce the defect.
+    validations:
+      required: false

.github/ISSUE_TEMPLATE/proposal.yml

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+---
+name: Proposal
+description: Propose an enhancement or new feature.
+labels:
+  - proposal
+body:
+  - type: textarea
+    id: change
+    attributes:
+      label: Proposed change
+      description: This could be a behavior change, enhanced API, or a new feature.
+    validations:
+      required: true
+  - type: textarea
+    id: usecase
+    attributes:
+      label: Use case
+      description: What is the use case or general motivation for this proposal?
+    validations:
+      required: true
+  - type: textarea
+    id: contribute
+    attributes:
+      label: Contribution
+      description: |-
+        Are you intending or interested in contributing code for this proposal if accepted?
+    validations:
+      required: false