feat: support alternative vcm models syntax

res/devtools/syntax/vcm.toml

@@ -0,0 +1,3 @@
+language = "VCM"
+extensions = ["vcm"]
+line-comment-start = "#"

res/models/stairs.vcm

@@ -0,0 +1,4 @@
+@box from (0,0,0) to (1,0.5,1) delete (top,south)
+@box from (0,0.5,0) to (1,1,0.5) delete (bottom,south)
+@rect from (0,0.5,0.5) right (1,0,0) up (0,0,0.5) texture "$2"
+@rect from (0,0,0) right (1,0,0) up (0,1,0) texture "$1"

res/models/stairs.xml

@@ -1,6 +0,0 @@
-<model>
-    <box from="0,0,0" to="1,0.5,1" delete="top,south"/>
-    <box from="0,0.5,0" to="1,1,0.5" delete="bottom,south"/>
-    <rect from="0,0.5,0.5" right="1,0,0" up="0,0,0.5" texture="$2"/>
-    <rect from="0,0,0" right="1,0,0" up="0,1,0" texture="$1"/>
-</model>

res/modules/internal/scripts_registry.lua

@@ -55,7 +55,7 @@ local function load_models_list(packs)
     local registry = export.registry
     for _, filename in ipairs(file.list("models")) do
         local ext = file.ext(filename)
-        if ext == "xml" then
+        if ext == "xml" or ext == "vcm" then
             registry[filename] = {type="model", unit=file.stem(filename)}
             table.insert(export.filenames, filename)
         end