chore(l2): forbid unwrap (#1290)

**Motivation**

Remove all the unwraps from the l2 module

**Description**

- Add `"unwrap_used = "deny"` to all `cargo.toml` files
- Add `allow-unwrap-in-tests = true` to `clippy.toml`
- Add new error types or use existing ones when possible.
- Remove all unwraps, change functions to return `Result<T, E>`, panic
and log when errors are unrecovereable

<!-- Link to issues: Resolves #111, Resolves #222 -->

Closes #1266

---------

Co-authored-by: Leandro Serra <[email protected]>
Co-authored-by: Federico Borello <[email protected]>

crates/l2/Cargo.toml

@@ -38,3 +38,6 @@ rand = "0.8.5"
 
 [lib]
 path = "./l2.rs"
+
+[lints.clippy]
+unwrap_used = "deny"

crates/l2/Clippy.toml

@@ -0,0 +1 @@
+allow-unwrap-in-tests = true

crates/l2/contracts/Cargo.toml

@@ -16,10 +16,14 @@ spinoff = "0.8.0"
 colored = "2.1.0"
 lazy_static = "1.5.0"
 tracing.workspace = true
+thiserror.workspace = true
 
 ethrex-l2 = { path = "../../l2" }
 ethrex-core = { path = "../../common" }
 
 [[bin]]
 name = "ethrex_l2_l1_deployer"
 path = "./deployer.rs"
+
+[lints.clippy]
+unwrap_used = "deny"