fix: allow --force to be optional

[rob4226]

This PR adds the force option that allows disabling the default behavior of always adding the --force flag to every NativeScript build/run command.
I saw the below note, but there are some edge cases where running npm i is not desirable or problematic.

always add --force for now since within Nx we use @nativescript/webpack at root only and the {N} cli shows a blocking error if not within the app

This commit still leaves the current behavior of adding --force by default but allows disabling the --force flag by explictly setting the new force option to false.

Example

"options": {
    "platform": "android",
    "noHmr": true,
    "force": false
},

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[rob4226]

@cla-bot check

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[NathanWalker]

Thank you for this @rob4226 !
I’ve been hesitating with the 8.1 cli release around the corner as it improves a number of things around workspace handling which includes ability to mix in yarn workspaces with Nx and also no longer require force with some conditions. Will merge this and out in a release after 8.1.

[rob4226]

@NathanWalker Ok sounds good!

[NathanWalker]

https://github.com/NativeScript/nx/releases/tag/2.0.5