Add memorial wall to the map

[mvmaltitz]

Test: The memorial wall is displaying, but looks like this in the figma

[fanevanjanahary]

It's a sample data @mvmaltitz

[mvmaltitz]

The memorial wall and columbarium look like plots on the current map. Please choose a different symbol for them.

Here is what it currently looks like:

There is no memorial information button on the left. This should be displayed similar to the columbarium

[Jeremy-Prior]

Styled both as simple polygons for the moment:

If the wall gets captured as a line the style can be adjusted and the columbarium can be adjusted to utilise a sprite symbol

[mvmaltitz]

@meomancer

There is no memorial information button on the left. This should be displayed and function similar to the columbarium

When clicked, it should bring up the following:

Please see the figma board: https://www.figma.com/design/Nx8BMiuHAMECbV9U8TelGr/Civitas-Cemetery