Added add_float() function for Document

src/document.rs

@@ -292,6 +292,15 @@ impl Document {
         add_value(self, field_name, value);
     }
 
+    /// Add a float value to the document.
+    ///
+    /// Args:
+    ///     field_name (str): The field name for which we are adding the integer.
+    ///     value (f64): The float that will be added to the document.
+    fn add_float(&mut self, field_name: String, value: f64) {
+        add_value(self, field_name, value);
+    }
+
     /// Add a date value to the document.
     ///
     /// Args: