feat: add experimental tailcall vm backend

fix-vm/src/instructions/builtins_misc.rs

@@ -1,7 +1,8 @@
-use crate::{BytecodeReader, PrimOp, StepResult, Value};
 use fix_builtins::BuiltinId;
 use num_enum::TryFromPrimitive;
 
+use crate::{BytecodeReader, PrimOp, StepResult, Value};
+
 impl<'gc> crate::Vm<'gc> {
     #[inline(always)]
     pub(crate) fn op_load_builtins(&mut self) -> StepResult<'gc> {
@@ -27,13 +28,19 @@ impl<'gc> crate::Vm<'gc> {
     }
 
     #[inline(always)]
-    pub(crate) fn op_load_repl_binding(&mut self, reader: &mut BytecodeReader<'_>) -> StepResult<'gc> {
+    pub(crate) fn op_load_repl_binding(
+        &mut self,
+        reader: &mut BytecodeReader<'_>,
+    ) -> StepResult<'gc> {
         let _name = reader.read_string_id();
         todo!("LoadReplBinding");
     }
 
     #[inline(always)]
-    pub(crate) fn op_load_scoped_binding(&mut self, reader: &mut BytecodeReader<'_>) -> StepResult<'gc> {
+    pub(crate) fn op_load_scoped_binding(
+        &mut self,
+        reader: &mut BytecodeReader<'_>,
+    ) -> StepResult<'gc> {
         let _name = reader.read_string_id();
         todo!("LoadScopedBinding");
     }
@@ -59,4 +66,4 @@ impl<'gc> crate::Vm<'gc> {
     pub(crate) fn op_resolve_path(&mut self, _ctx: &mut impl crate::VmContext) -> StepResult<'gc> {
         todo!("implement ResolvePath");
     }
-}
+}