provide codeAction in .bs when callfunc can be refactored to callfunc operator

[georgejecook]

would be great if the parser could identify when brs syntax could be upgraded to bs syntax.

for example, consider:

node.callFunc("funcName", invalid)

this could be :
node@.funcName()

[TwitchBronBron]

This will be fairly simple to implement once #298 lands.

[TwitchBronBron]

This should be really simple to implement now that codeActions are available. For .bs files, we could emit a hint for every callfunc, that is linked to a code action that recommends switching to callfunc

[TwitchBronBron]

I guess we wouldn't actually need to add a diagnostic... It could just be shown anytime the cursor is on that line.... But that would get less attention drawn to it.