Add general tool criteria

Author: mhatzl

arewesafetycriticalyet.org/docs/tooling/2_tools-list.mdx

@@ -17,6 +17,10 @@ If you want to add or update the list, please open an issue on the [safety-criti
 
 Tools will be included in the list only if they meet the following criteria.
 
+**General:**
+- Supports Rust
+- Useful for safety-critical development
+
 **Close Source:**
 - First productive release: > 1 year old
 - Tool still supported by vendor