Implement support for parsing and displaying starting positions of Red Alert 1 and Tiberian Dawn maps, with non-isometric cells

[Rampastring]

This PR adds optional, configurable support for displaying starting locations of players in Red Alert 1 and Tiberian Dawn maps correctly.

These games use non-isometric cells, which requires some changes to the cell math for figuring out the pixel coordinates of starting locations.

They also have a slightly different map format when it comes to specifying the size of the map, which required changes to the map size parsing code.

To support these features without making TS/YR support more complicated, two new keys were introduced to ClientDefinitions.ini:

[Settings]
UseIsometricCells=
WaypointCoefficient=

WaypointCoefficient is only used when calculating waypoint positions for RA and TD. UseIsometricCells defines whether the use TS/YR or RA1 logic for parsing the map size and for cell math. It defaults to true to keep compatibility with existing TS/YR implementations of the client.

As a bonus, this PR fixes some outdated syntax from Map.cs.

[github-actions[bot]]

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