feat: 提取 oxide_builtins 独立 crate，泛型化 <H: VmHost>

crates/oxide_builtins/src/global.rs

@@ -0,0 +1,18 @@
+use oxide_runtime_api::VmHost;
+mod annex_b;
+mod uri;
+
+pub use annex_b::{js_escape, js_unescape};
+pub use uri::{decode_uri, decode_uri_component, encode_uri, encode_uri_component};
+
+fn string_arg<H: VmHost>(vm: &mut H, args: &[u8]) -> String {
+    if args.len() > 1 {
+        oxide_runtime_api::to_string(vm.reg(args[1]))
+    } else {
+        "undefined".to_string()
+    }
+}
+
+fn parse_hex_u8(slice: &[u8]) -> Option<u8> {
+    std::str::from_utf8(slice).ok().and_then(|s| u8::from_str_radix(s, 16).ok())
+}