Add hardhat-switch-network plugin

[0xNeshi]

This PR adds a new plugin named hardhat-switch-network which is used to enable on-the-fly network switching within Hardhat scripts, tests and tasks.

It can be found on this: https://github.com/0xNeshi/hardhat-switch-network
It's npm repo: https://www.npmjs.com/package/hardhat-switch-network

It is supposed so replace the now-unmaintained package hardhat-change-network, which is also listed in the the plugins.ts file here

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Name	Status	Preview	Comments	Updated (UTC)
hardhat	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Sep 2, 2024 3:42pm

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Latest commit: 173afad

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[alcuadrado]

Hey, thanks for sending this PR and creating this plugin!

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[0xNeshi]

@alcuadrado should hardhat-change-network be removed from the plugins array?
It is unmaintained (last commit was 2 years ago)

[alcuadrado]

Makes sense. Do you mind sending a PR?