Adding issue and PR templates (#63)

* Adding issue and PR templates

* adding whitespace, removing signoff requirement

.github/ISSUE_TEMPLATE/config.yml

@@ -0,0 +1,8 @@
+blank_issues_enabled: false
+contact_links:
+  - name: Discussion
+    url: https://github.com/ConnectEverything/nex/discussions
+    about: Ideal for ideas, feedback, or longer form questions.
+  - name: Chat
+    url: https://slack.nats.io
+    about: Ideal for short, one-off questions, general conversation, and meeting other NATS/Nex users!

.github/ISSUE_TEMPLATE/defect.yml

@@ -0,0 +1,46 @@
+---
+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: Nex and NATS version
+      description: |-
+        Provide the versions you were using when the defect was observed.
+        For the server, use `nats-server --version`, check the startup log output, or the image tag pulled from Docker.
+        For Nex, use `nex --version`        
+    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, 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

@@ -0,0 +1,28 @@
+---
+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

.github/PULL_REQUEST_TEMPLATE.md

@@ -0,0 +1 @@
+<!-- Please make sure to read CONTRIBUTING.md, then delete this notice and replace it with your PR description. -->