Add Chocolatey Install Instructions

[digitalcoyote]

Added Chocolatey install instructions

• Link to Chocolatey's Why-Chocolatey Page for users who don't recognize it
• I can add links to each package as well
• Example command to install both tools
  • Based on krew instructions, this may need to be split into separate examples

Removed duplicate Homebrew instructions

• A duplicate set of Homebrew instructions were under the Linux section

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[digitalcoyote]

It will likely need to wait on package approval before instructions are added.
https://chocolatey.org/packages/kubectx
https://chocolatey.org/packages/kubens

[digitalcoyote]

@googlebot I signed it!

[googlebot]

CLAs look good, thanks!

ℹ️ Googlers: Go here for more info.

[digitalcoyote]

I have received notification that the packages have been approved on Chocolatey

[eshepelyuk]

Confirming, that I'm using Chocolatey for installing the tools.

[ahmetb]

It seems you are

1. removing linux brew instructions
2. missing a ### Windows title.

once we fix those, we can merge this.

[digitalcoyote]

thanks for catching that, I believe I have corrected both of those. Let me know if anything else is out of place and I'll try to correct it as well.

[ahmetb]

Sorry I completely missed this. If you can address the large conflict and ping me I can emerge this.