Add new issue template for design proposals. (#381)

* Add new issue template for design proposals.

* Update .github/ISSUE_TEMPLATE/api_design_proposal.md

Co-authored-by: Guen P <guenp@microsoft.com>

* Feedback from @msoeken.

* Address feedback.

Co-authored-by: Guen P <guenp@microsoft.com>

.github/ISSUE_TEMPLATE/api_design_proposal.md

@@ -0,0 +1,83 @@
+---
+name: Q# API Design Proposal
+about: Propose a modification or addition to the Q# standard or domain-specific library APIs
+title: ''
+labels: Kind-Enhancement, Status-NeedsApiReview
+assignees: ''
+---
+
+<!-- 
+    This template is used for suggesting or proposing modifications to the Q# standard or domain-specific
+    library APIs. Don't worry if there's a section that you're unsure about; we're happy to help
+    in issue comments and discussions!
+
+    If you're interested in making broad feature suggestions, the feature request template
+    may be of interest instead:
+
+        https://github.com/microsoft/QuantumLibraries/issues/new?assignees=&labels=enhancement&template=feature_request.md&title=
+
+    If you are interested in suggesting language improvements or modifications,
+    please see the qsharp-language repository at:
+
+        https://github.com/microsoft/qsharp-language
+-->
+
+# Proposal title
+
+## Conceptual overview
+
+<!-- Provide a motivation for and description of your proposal here. -->
+
+### Current status
+
+<!-- Contrast your proposal with the current status of the Q# standard and domain-specific libraries here. -->
+
+### User feedback
+
+<!-- If there is specific feedback (typically other GitHub issues) that motivate your proposal, link them here along with a brief discussion of how your proposal addresses that feedback. -->
+
+### Child issues
+
+<!-- This section should be a bulleted list of any issues that will be resolved by a completed implementation of your proposal. Note that this section may be redundant with the previous section; that's perfectly OK. -->
+
+## Proposal
+
+### New and modified functions, operations, and UDTs
+
+<!--
+    This is the core of your actual proposal, and should consist of a bulleted list of changes to the Q# API surface included in your proposal, grouped by namespace.
+
+    In writing this section, it can be helpful to draft out what API documentation would look like for your proposal, especially the /// # Example sections for each function and operation.
+    For more information about writing API documentation, check out https://aka.ms/qdk/contrib/api-docs.
+-->
+
+
+### Modifications to style guide
+
+<!-- Does your proposal require modifying the style guide or API design principles? If so, please list and discuss any required modifications here, as that carries a unique impact that requires separate discussion. -->
+
+### Impact of breaking changes
+
+<!-- If your proposal includes breaking changes beyond @Deprecated attributes, please list those changes here and their expected impact on Q# users. -->
+
+## Examples
+
+### Current status
+
+<!-- As appropriate, list examples of using the current Q# API. -->
+
+### Using proposed changes
+
+<!-- As appropriate, list examples of using the changes included in your proposal. -->
+
+## Relationship to Q# language feature proposals
+
+<!-- If your proposal is related to existing Q# language proposals (see https://github.com/microsoft/qsharp-language), please list those proposals here along with how your proposal would change based on the outcome of those Q# language discussions. -->
+
+## Alternatives considered
+
+<!-- In this section, list each different alternative to your proposal as a distinct subsection, and compare the pros/cons with respect to your proposal. -->
+
+## Open design questions and considerations
+
+<!-- List any questions and considerations not resolved by your proposal here, so that they can be discussed and addressed during API review meetings. -->

.github/ISSUE_TEMPLATE/bug_report.md

@@ -2,7 +2,7 @@
 name: Bug report
 about: Create a report to help us improve
 title: ''
-labels: bug
+labels: Kind-Bug
 assignees: ''
 
 ---

.github/ISSUE_TEMPLATE/config.yml

@@ -0,0 +1 @@
+blank_issues_enabled: false

.github/ISSUE_TEMPLATE/feature_request.md

@@ -2,7 +2,7 @@
 name: Feature request
 about: Suggest an idea for the Quantum Development Kit libraries
 title: ''
-labels: enhancement
+labels: Kind-Enhancement
 assignees: ''
 
 ---