Change $props syntax to simplify Typescripe typing

[Evilsushi]

current $props() syntax to export as is the same as type syntax used for Typescript. So this creates a lot of extra boilerplate when using Typescript. Exporting as isn't as common as suppling types, so I propose we change the export as syntax to something like this:

let { myprop1 : number, { myprop2 as Prop2 } : string, myProp3 : boolean } = $props();

or if the curly brackets cause issue, maybe like this:

let { myProp1 : number, myProp2 as prop2 : string, myProp3 : boolean } = $props();

[brunnerh]

The syntax has to conform to TS/JS so existing tooling continues to work.
There have been some suggestions on the issue here:

• Add a (singular) $prop rune #9241