Add gsio-client and gsio-wallet crates with initial implementations

- Introduced `gsio-client` crate for interacting with GSIO nodes, including ledger entry management and node discovery.
- Introduced `gsio-wallet` crate for key management, transaction creation, and wallet functionality.
- Updated workspace configuration to include new crates.

.gitignore

@@ -1,4 +1,8 @@
 target/
 node_modules/
 .wrangler/
-.idea/
+.idea/
+project/
+/prompt.md
+/todo
+/.toak-ignore