Implement beman.ranges_and_views

[inbal2l]

This task is to create a new Beman.RangesAndViews library, however, this library should grow incrementally - there's not expectation that it will be implemented all at once :)

The task is to create the project and namespace within Beman, and add to it:

1. The basic concepts and structs for ranges (range, view sentinal, etc.)
2. Add utils incrementally, such as:
   1. "P3060: Add std::views::upto(n)" by Weile Wei, Zhihao Yuan
   2. "P3137: views::to_input" by Tim Song
   3. "P3138: views::cache_last" by Tim Song

(more will be added later, feel free to suggest in comments)

[dhollman]

I'm going to take a shot at this one :-)