Fix invoke calls in dialog & shell init scripts

[morajabi]

This fixes an issue that broke links and dialogs in latest commit. Let me know if I should do it in another way.

[amrbashir]

Looks like we missed this one in #673, these files should now be converted to a typescript file and compiled using rollup, similar to the notification plugins

[morajabi]

For people who have this issue, here's a workaround without patching until this is fixed. Add this line in your entry JS/TS file:

 window.invoke = window.__TAURI_INTERNALS__.invoke;

[morajabi]

@amrbashir Feel free to close this PR if this isn't the way you want to handle it.