feat(syntax): add SymbolId::new method

crates/oxc_syntax/src/symbol.rs

@@ -8,6 +8,29 @@ use serde::{Serialize, Serializer};
 #[derive(Debug, Clone, Copy, Eq, PartialEq, Ord, PartialOrd, Hash)]
 pub struct SymbolId(NonMaxU32);
 
+impl SymbolId {
+    /// Create `SymbolId` from `u32`.
+    ///
+    /// # Panics
+    /// Panics if `idx` is `u32::MAX`.
+    pub const fn new(idx: u32) -> Self {
+        if let Some(idx) = NonMaxU32::new(idx) {
+            return Self(idx);
+        }
+        panic!();
+    }
+
+    /// Create `SymbolId` from `u32` unchecked.
+    ///
+    /// # SAFETY
+    /// `idx` must not be `u32::MAX`.
+    #[allow(clippy::missing_safety_doc, clippy::unnecessary_safety_comment)]
+    pub const unsafe fn new_unchecked(idx: u32) -> Self {
+        // SAFETY: Caller must ensure `idx` is not `u32::MAX`
+        Self(NonMaxU32::new_unchecked(idx))
+    }
+}
+
 impl Idx for SymbolId {
     #[allow(clippy::cast_possible_truncation)]
     fn from_usize(idx: usize) -> Self {