Make global variables available from .args files

[rin-st]

Start with solidityFramework variable

Current idea (copying part of Shiv's comment here #331 (comment)):

Umm just thinking out loud, what if for extension developers in .args.mjs file we suggest them to export a function? for example:

// page.tsx.args.mjs

export const description = ({ solidityFramework }) => {
 return `${solidityFramwork} === "hardhat" ? "hardhat" : "foundry`
}

And while building the final page in withDefaults function we check if it's direct string we render it but extension developer is calling function then we pass the solidityFramework to that function and call it?

Like extension developer can expose us the args in two way one by passing the string directly or by passing a function which returns string.

[rin-st]

#350