chore: apply cargo fmt across workspace and update docs

- Run cargo fmt on all Rust crates for consistent formatting
- Update CLAUDE.md with WASM plugin commands and dev.ps1 instructions
- Update wiki: add WASM plugin architecture, rewrite dev environment docs
- Minor frontend cleanup (unused imports)

crates/erp-workflow/src/entity/mod.rs

@@ -1,5 +1,5 @@
 pub mod process_definition;
 pub mod process_instance;
-pub mod token;
-pub mod task;
 pub mod process_variable;
+pub mod task;
+pub mod token;