github: update issue templates (#6191)

.github/ISSUE_TEMPLATE

@@ -1,8 +0,0 @@
-Please answer these questions before submitting your issue.
-
-### What version of gRPC are you using?
-
-
-### What did you expect to see?
-
-

.github/ISSUE_TEMPLATE/ask_question.md

@@ -0,0 +1,12 @@
+---
+name: Ask a question
+about: Asking a question related gRPC-Java
+labels: question
+---
+
+For questions not directly related to gRPC-Java, please use [stackoverflow](https://stackoverflow.com/questions/tagged/grpc-java).
+Also, if question is not gRPC-Java implementation specific, consider using [grpc.io](https://groups.google.com/forum/#!forum/grpc-io).
+
+Make sure you include information that can help us understand your question.
+
+[[Your question here]]

.github/ISSUE_TEMPLATE/bug_report.md

@@ -0,0 +1,19 @@
+---
+name: Report a bug
+about: Create a bug report to help us improve
+labels: bug
+---
+
+Please answer these questions before submitting a bug report.
+
+### What version of gRPC are you using?
+
+### What operating system (Linux, Windows,...) and version?
+
+### What did you expect to see?
+
+### What did you see instead?
+
+### Steps to reproduce the bug
+
+Make sure you include information that can help us debug (full error message, exception listing, stack trace, logs).

.github/ISSUE_TEMPLATE/feature_report.md

@@ -0,0 +1,17 @@
+---
+name: Request a feature
+about: Suggest an enhancement for gRPC
+labels: enhancement
+---
+
+### Is your feature request related to a problem? Please describe.
+A clear and concise description of what the problem is. Ex. I'm always frustrated when [...]
+
+### Describe the solution you'd like
+A clear and concise description of what you want to happen.
+
+### Describe alternatives you've considered
+A clear and concise description of any alternative solutions or features you've considered.
+
+### Additional context
+Add any other context about the feature request here.