docs(ISSUE_TEMPLATE.md): First iteration

First iteration of github issues template.

.github/ISSUE_TEMPLATE.md

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+<!--
+Please use the following template to assist with creating an issue and to ensure a speedy resolution. If an area is not applicable, feel free to delete the area or mark with `N/A`
+-->
+
+### Rust Version
+
+* Use the output of `rustc -V`
+
+### Affected Version of clap
+
+* Can be found in Cargo.lock of your project (i.e. `grep clap Cargo.lock`)
+
+### Bug or Feature Request Summary
+
+
+### Expected Behavior Summary
+
+
+### Actual Behavior Summary
+
+
+### Steps to Reproduce the issue
+
+
+### Sample Code or Link to Sample Code
+
+
+### Debug output