Micro-optimization: Avoid Unnecessary Rebuilding

[kevingamez]

The const keyword in Dart denotes the creation of compile-time constants, and its usage in this specific context aims to convey to the Dart compiler that the widget is immutable, signifying that its properties remain constant throughout the lifespan of the widget tree. The key idea is that by utilizing const, the Dart compiler can engage in constant folding, a process where it evaluates and allocates the widget during compile-time rather than runtime. This potentially leads to more efficient code, reducing the memory footprint and expediting the initialization process.