Add feature-proposal template

.gitea/issue_template/feature-proposal.md

@@ -0,0 +1,24 @@
+---
+name:   "Feature Proposal"
+about:  "Propose a new feature"
+title:  "Feature: "
+ref:    main
+labels:
+- enhancement
+---
+# Feature Progress
+<!-- Describe the steps for implementing this feature in libconlang -->
+- [ ] <!-- Step 1 of implementing a feature -->
+
+# Feature description
+<!-- [Feature name] does a cool thing that you should describe here -->
+
+# Example
+<!--
+Demonstrate this feature with a clear, concise code example
+Right now, we're (ab)using Rust syntax highlighting,
+since it most closely matches what I'm currently aiming for
+-->
+```rust
+
+```