Added editor.fontWeight and terminal.integrated.fontWeight configuration

[ramamurthynagaraj]

Pull request for #381

[msftclas]

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[msftclas]

@ramamurthynagaraj, Thanks for signing the contribution license agreement so quickly! Actual humans will now validate the agreement and then evaluate the PR.

Thanks, MSBOT;

[alexdima]

❤️ Looks great! Thank you for the contribution!

[MaxySpark]

when we will able to use this feature?

[alexdima]

@MaxySpark This change is already in the Insiders channel (that is built nightly from master) and it will ship with the next stable release, the August release. The Milestone indicates this.