Updated GitHub issue and code review templates

Necessary to fix an issue with the issue templates since GitHub no longer respects the `.github/ISSUE_TEMPLATE.md` file so am now using the `ISSUE_TEMPLATE` folder with additional links to community and security information. Only a single issue template is being used to reduce the number of choices people have to make. The code view template was also updated to improve the descriptions.

Milestone: minor

.github/ISSUE_TEMPLATE/config.yml

@@ -0,0 +1,8 @@
+blank_issues_enabled: false
+contact_links:
+  - name: Community
+    url: https://alchemists.io/community
+    about: Please ask questions or discuss specifics here.
+  - name: Security
+    url: https://alchemists.io/policies/security
+    about: Please report security vulnerabilities here.

.github/ISSUE_TEMPLATE/issue.md

@@ -0,0 +1,18 @@
+---
+name: Issue
+title: "Add|Update|Fix|Remove|Refactor "
+about: Report an issue. Please use only one of the subject prefixes.
+---
+
+<!--
+Please focus on well written issues. Context: https://alchemists.io/articles/software_issues.
+-->
+
+## Why
+<!-- Required. Describe, briefly, why this issue is important. -->
+
+## How
+<!-- Optional. List exact steps to implement or reproduce behavior. Screen shots/casts are welcome! -->
+
+## Notes
+<!-- Optional. Provide additional details like operating system, software version(s), stack dump, logs, or anything else that would be helpful. -->