Enable clippy lints on a workspace level

This enables a lot more lints than before in some crates, so this fixed a lot of warnings as well.

crates/handlers/Cargo.toml

@@ -7,6 +7,9 @@ license.workspace = true
 homepage.workspace = true
 repository.workspace = true
 
+[lints]
+workspace = true
+
 [dependencies]
 # Async runtime
 tokio = { version = "1.34.0", features = ["macros"] }

crates/handlers/src/lib.rs

@@ -12,14 +12,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-#![forbid(unsafe_code)]
-#![deny(
-    clippy::all,
-    clippy::str_to_string,
-    rustdoc::broken_intra_doc_links,
-    clippy::future_not_send
-)]
-#![warn(clippy::pedantic)]
+#![deny(clippy::future_not_send)]
 #![allow(
     // Some axum handlers need that
     clippy::unused_async,