feat: custom local replica (#25)

Adds a crate that allows to run a local replica using a custom gateway.

Author: ilbertt

.gitignore

@@ -4,3 +4,6 @@ target/
 dist/
 .env
 .canbench/
+
+.DS_Store
+pocket-ic

.vscode/settings.json

@@ -13,5 +13,5 @@
   "[rust]": {
     "editor.defaultFormatter": "rust-lang.rust-analyzer"
   },
-  "rust-analyzer.cargo.features": ["canbench-rs"]
+  "rust-analyzer.cargo.features": "all"
 }