[Bug]: Fontsource loader writes wrong path

[luastoned]

Hello,

these two cases push an additional / breaking import statement.

unplugin-fonts/src/loaders/fontsource.ts

Lines 66 to 71 in a7e66d5

	source.push(`import '@fontsource-variable/${name}/standard.css';`)
	continue
	}
	// If the selected axes is not within standard, return full
	source.push(`import '@fontsource-variable/${name}/full.css';`)

The build step then breaks:

transforming (1) index.htmlUnable to resolve `@import "import '@fontsource-variable/open-sans/standard.css';"` from /undebug
✓ 4 modules transformed.
x Build failed in 84ms
error during build:
Error: [vite:css] [postcss] ENOENT: no such file or directory, open 'import '@fontsource-variable/open-sans/standard.css';'
file: unfonts.css:undefined:NaN

The logic for variable is also odd, it does not matter if opsz is true or false, simply being there has unintended side effects.