Move assets outside of web directory, to respect license, and add preprocess script

Author: Fernando-A-Rocha

web/src/assets/images/cursor-alpha.jpg renamed to assets/images/cursor-alpha.jpg

@@ -22,4 +22,7 @@ pnpm-debug.log*
 
 # tmLanguage file
 src/grammars/
-public/grammars/
+public/grammars/
+
+# assets copied from outside web directory
+assets/

web/src/assets/images/element_tree.webp renamed to assets/images/element_tree.webp

@@ -61,11 +61,13 @@ export default defineConfig({
 				{
 					label: 'Reference',
 					items: [
+						{label: 'ID Lists', link: '/reference/ID_Lists'},
 						{
 							label: 'Resources',
 							items: [
 								{ label: 'Lua API', link: '/reference/Lua_API' },
 								{ label: 'Meta.xml', link: '/reference/Meta.xml'},
+								{ label: 'Resource Web Access', link: '/reference/Resource_Web_Access'},
 								{
 									label: 'Functions',
 									collapsed: true,