font: add noop endFrame calls to all other shapers

src/font/shaper/harfbuzz.zig

@@ -74,6 +74,10 @@ pub const Shaper = struct {
         self.hb_feats.deinit(self.alloc);
     }
 
+    pub fn endFrame(self: *const Shaper) void {
+        _ = self;
+    }
+
     /// Returns an iterator that returns one text run at a time for the
     /// given terminal row. Note that text runs are are only valid one at a time
     /// for a Shaper struct since they share state.

src/font/shaper/noop.zig

@@ -64,6 +64,10 @@ pub const Shaper = struct {
         self.run_state.deinit(self.alloc);
     }
 
+    pub fn endFrame(self: *const Shaper) void {
+        _ = self;
+    }
+
     pub fn runIterator(
         self: *Shaper,
         grid: *SharedGrid,

src/font/shaper/web_canvas.zig

@@ -52,6 +52,10 @@ pub const Shaper = struct {
         self.* = undefined;
     }
 
+    pub fn endFrame(self: *const Shaper) void {
+        _ = self;
+    }
+
     /// Returns an iterator that returns one text run at a time for the
     /// given terminal row. Note that text runs are are only valid one at a time
     /// for a Shaper struct since they share state.