build(ec_renderer_wasm): 添加WASM构建配置和依赖

添加了WASM构建所需的Cargo.toml配置，包括cdylib类型、依赖项和优化设置。同时移除了不必要的测试代码，并添加了.gitignore文件以忽略构建目录。

Author: ExquisiteCore

frontend/ec_renderer_wasm/.gitignore

@@ -0,0 +1,2 @@
+/pkg
+/target

frontend/ec_renderer_wasm/Cargo.lock

@@ -3,4 +3,22 @@ name = "ec_renderer_wasm"
 version = "0.1.0"
 edition = "2024"
 
+[lib]
+crate-type = ["cdylib"]
+
+[features]
+default = ["console_error_panic_hook"]
+
+[profile.release]
+lto = true
+opt-level = 3
+strip = true
+#codegen-units = 1
+#debug = true
+
 [dependencies]
+console_error_panic_hook = { version = "0.1.7", optional = true }
+wasm-bindgen = { version = "0.2.100", features = ["serde-serialize"] }
+serde = { version = "1.0", features = ["derive"] }
+serde_json = "1.0"
+pulldown-cmark = "0.13.0"

frontend/ec_renderer_wasm/Cargo.toml

@@ -1,14 +1,3 @@
 pub fn add(left: u64, right: u64) -> u64 {
     left + right
 }
-
-#[cfg(test)]
-mod tests {
-    use super::*;
-
-    #[test]
-    fn it_works() {
-        let result = add(2, 2);
-        assert_eq!(result, 4);
-    }
-}