[Feature] Add support for .dur file format and animations (closes #719) (#833)

Adds support for durdraw's .dur file format. Supports ascii, animations, and 16/256 color display.

Reviewed-on: https://codeberg.org/fairyglade/ly/pulls/833
Reviewed-by: AnErrupTion <anerruption@disroot.org>
Co-authored-by: hynak <hynak@noreply.codeberg.org>
Co-committed-by: hynak <hynak@noreply.codeberg.org>

res/config.ini

@@ -24,6 +24,7 @@ allow_empty_password = true
 # matrix   -> CMatrix
 # colormix -> Color mixing shader
 # gameoflife -> John Conway's Game of Life
+# dur_file -> .dur file format (https://github.com/cmang/durdraw/tree/master)
 animation = none
 
 # Stop the animation after some time
@@ -163,6 +164,15 @@ doom_middle_color = 0x00C78F17
 # DOOM animation custom bottom color (high intensity flames)
 doom_bottom_color = 0x00FFFFFF
 
+# Dur file path
+dur_file_path = $CONFIG_DIRECTORY/ly/example.dur
+
+# Dur offset x direction
+dur_x_offset = 0
+
+# Dur offset y direction
+dur_y_offset = 0
+
 # Set margin to the edges of the DM (useful for curved monitors)
 edge_margin = 0
 
@@ -190,6 +200,8 @@ fg = 0x00FFFFFF
 # TB_WHITE                0x0008
 # If full color is off, the styling options still work. The colors are
 # always 32-bit values with the styling in the most significant byte.
+# Note: If using the dur_file animation option and the dur file's color range 
+# is saved as 256 with this option disabled, the file will not be drawn.
 full_color = true
 
 # Game of Life entropy interval (0 = disabled, >0 = add entropy every N generations)