Symbol = (symbol = {}) => ({
	id: symbol.id || uuidv4(),
	name: symbol.name || '',
	code: symbol.code || {
		css: '',
		html: '',
		js: ''
	},
	fields: symbol.fields || [],
	entries: symbol.entries || [],
	owner_site: symbol.site || symbol.owner_site || null,
	index: symbol.index === undefined ? null : symbol.index,
	page_types: symbol.page_types || []
})
Creates a new symbol object with default values.
@param symbol - The symbol properties to be applied to the new symbol
@returns {import('$lib').Symbol}