Discourage bots from pathing through deadly areas

[sunzenshen]

Description

Add a small pathing penalty to the NavArea a bot was killed at. Over the course of a match, bots will try other paths that have fewer occurrences of deaths. Intended to emulate players trying different map traversal strategies as they learn a map.

Toolchain

• Windows MSVC VS2022

Related Work

• related OnStuck location sharing for NavArea avoidance #1598

[sunzenshen]

Primarily to address the feedback that bots are predictable given a similar set of circumstances, such as a repeated ghost spawn location.

Especially in modes like TDM, bots tend to take the same direct paths in order to path towards various points of interest like spawn points or ghost spawns:

With this PR, eventually bots will start to avoid extremely wide open kill zones, and gradually use paths that have some extra length cost but less death penalty, which emerges as bots taking routes with more cover:

One way to verify the effects of the PR is to greatly increase neo_bot_path_reservation_killed_penalty to values of 100 or more. With such a large penalty, bots conspicuously avoid areas to the point where they will climb obstacles to avoid an area (so an excessively large value can be problematic). Initial testing of just 10 points of penalty appear to be enough to gradually shift the paths over a course of a match.