Update issue templates

Expand Bug report and add Feature Request template.

.github/ISSUE_TEMPLATE/bug_report.md

@@ -10,7 +10,7 @@ assignees: ''
 **Describe the bug**
 Description
 
-**Desktop (please complete the following information):**
+**Environment (please complete the following information):**
  - OS: [e.g. Windows 11, Fedora, MacOs]
  - Bitdepth: [32-bit / 64-bit]
  - GPU: [AMD Radeon RX 6900 XT, NVIDIA GEFORCE RTX 3060 Ti]

.github/ISSUE_TEMPLATE/feature_request.md

@@ -0,0 +1,16 @@
+---
+name: Feature request
+about: Suggest an idea for this project
+title: ''
+labels: enhancement
+assignees: ''
+
+---
+
+**What enhancement are you suggesting for the Vulkan Loader?  Please describe in detail. **
+Description
+
+**Is this specific to a single platform?**
+OS platform
+
+**Additional context**