Defining unique configuration properties

I want to introduce my own configuration properties in my project that I'd use across my test files. Is there a way to do this in playwright.config.ts, e.g. in the use section? I'd do something like this:

const defaultConfig: PlaywrightTestConfig = defineConfig({ use: } myConfig: { prop1: val1, prop2: val2, prop3: val3, }, }

If it is not possible in playwright.config.ts, what is the suggested way of achieving this? Many thanks