A lot of work

* moved all ugui code to lib/ugui.c3l and made it a library/module
* started work on a sdl3 renderer, with shaders etc
* added the new sdl3.c3l library as a dependency
* makefile is for the renderer

scripts/compile_shaders.sh

@@ -0,0 +1,41 @@
+#!/bin/sh
+
+source_directory="./resources/shaders/source"
+compiled_directory="./resources/shaders/compiled"
+#vulkan_version="1.0"
+
+mkdir -p "$compiled_directory"
+rm -f "$compiled_directory"/*
+
+echo "Compiling from $source_directory -> $compiled_directory"
+
+for file in "$source_directory"/*; do
+    [ -f "$file" ] || continue  # Skip non-files
+    filename=$(basename "$file")
+    
+    # Extract filename parts using POSIX parameter expansion
+    shader_language="${filename##*.}"
+    stage_part="${filename%.*}"  # Remove extension
+    base_name="${stage_part%.*}" # Remove stage
+    stage="${stage_part#"$base_name"}"
+    stage="${stage#.}"  # Remove leading dot
+    
+    # Skip if not in base.stage.glsl format
+    [ "$shader_language" = "glsl" ] && [ -n "$base_name" ] && [ -n "$stage" ] || continue
+
+    # Handle HLSL rejection
+    if [ "$shader_language" != "glsl" ]; then 
+        echo "Error: Only GLSL shaders are supported" >&2
+        exit 1
+    fi
+
+    # Compile based on shader stage
+    case "$stage" in
+        frag|vert)
+            echo "$stage $filename > $base_name.$stage.spv"
+            glslc -O0 -g -fshader-stage="$stage" "$file" -o "$compiled_directory/$base_name.$stage.spv"
+            ;;
+    esac
+done
+
+tree "$compiled_directory"