Start and the end and work backward

[oubiwann]

The code in the client repo has been created as part of following along with the Rust roguelike Tutorial, with serious modifications. A more recent change to add level support combined with the configuration system resulted in a bug that crashed the game after load-up. A few weeks of debugging didn't reveal the root cause.

Furthermore, later in the tutorial a whole series of optimizations are made. We want to take advantage of those now and not later.

Sub-tickets:

• Use chapter 73 as the basis for an update to the client - Use chapter 73 as the basis for an update to the client #20
• Rename the project library name - Rename the project library name #23
• Add configuration support to new base branch - Add configuration support to new base branch #21
• Remove all web assembly code in new base branch - Remove all web assembly code in new base branch #22
• More to come ...