Fixes #793

Continuation of #792 that
adds support for `1.2.3[channel=...]` and consolidates logic of parsing
matchspec and namelessmatchspec some more.

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Co-authored-by: Ruben Arts <ruben.arts@hotmail.com>

Bumps `resolvo` to 0.7.0.

Change all links from `conda-incubator` to `conda`

Needed for  conda-forge/conda-smithy#2034

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Co-authored-by: Bas Zalmstra <zalmstra.bas@gmail.com>

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Fixing the example in the quickstart

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