readme: add LLVM IR to Geode compiler by @nickwanninger to Users section

Author: mewmew

README.md

@@ -16,6 +16,7 @@ go get -u github.com/llir/llvm/...
 
 * [blessedvirginmary](https://github.com/NateGraff/blessedvirginmary): LLVM IR to Bash transpiler by [@NateGraff](https://github.com/NateGraff).
 * [decomp](https://github.com/decomp/decomp): LLVM IR to Go decompiler by [@decomp](https://github.com/decomp).
+* [geode](https://github.com/geode-lang/geode): Geode to LLVM IR compiler by [@nickwanninger](https://github.com/nickwanninger).
 * [tre](https://github.com/zegl/tre): Go to LLVM IR compiler by [@zegl](https://github.com/zegl).
 * [uc](https://github.com/mewmew/uc): µC to LLVM IR compiler by [@sangisos](https://github.com/sangisos) and [@mewmew](https://github.com/mewmew).