♻️🍱 config, cli, vanth, vanth_derive, varo: Reformatted code and added editor configuration files

- Added `.zed/settings.json` to configure rust-analyzer with `leptosfmt`.
- Created `rustfmt.toml` with max width 120 and comment wrapping settings.
- Applied consistent formatting across all modified crates using rustfmt.
- Reorganized import statements and improved code style in multiple modules.

.zed/settings.json

@@ -0,0 +1,11 @@
+{
+    "lsp": {
+        "rust-analyzer": {
+            "initialization_options": {
+                "rustfmt": {
+                    "overrideCommand": ["leptosfmt", "--stdin", "--rustfmt"]
+                }
+            }
+        }
+    }
+}