Add recipe to build cvxpy

[sebp]

This is a recipe to build cvxpy.

[conda-forge-linter]

Hi! This is the friendly automated conda-forge-linting service.

I wanted to let you know that I linted all conda-recipes in your PR (recipes/cvxpy) and found some lint.

Here's what I've got...

For recipes/cvxpy:

• Failed to even lint the recipe (might be a conda-smithy bug) 😢

[conda-forge-linter]

Hi! This is the friendly automated conda-forge-linting service.

I wanted to let you know that I linted all conda-recipes in your PR (recipes/cvxpy, recipes/scs) and found some lint.

Here's what I've got...

For recipes/cvxpy:

• Failed to even lint the recipe (might be a conda-smithy bug) 😢

[conda-forge-linter]

Hi! This is the friendly automated conda-forge-linting service.

I wanted to let you know that I linted all conda-recipes in your PR (recipes/cvxpy, recipes/scs) and found some lint.

Here's what I've got...

For recipes/cvxpy:

• Failed to even lint the recipe (might be a conda-smithy bug) 😢

For recipes/scs:

• Selectors are suggested to take a <two spaces>#<one space>[<expression>] form.

[conda-forge-linter]

Hi! This is the friendly automated conda-forge-linting service.

I wanted to let you know that I linted all conda-recipes in your PR (recipes/cvxcanon, recipes/cvxpy, recipes/scs) and found some lint.

Here's what I've got...

For recipes/cvxcanon:

• Failed to even lint the recipe (might be a conda-smithy bug) 😢

For recipes/cvxpy:

• Failed to even lint the recipe (might be a conda-smithy bug) 😢

For recipes/scs:

• Selectors are suggested to take a <two spaces>#<one space>[<expression>] form.

[conda-forge-linter]

Hi! This is the friendly automated conda-forge-linting service.

I wanted to let you know that I linted all conda-recipes in your PR (recipes/cvxcanon, recipes/cvxpy, recipes/scs) and found some lint.

Here's what I've got...

For recipes/cvxcanon:

• Failed to even lint the recipe (might be a conda-smithy bug) 😢

For recipes/cvxpy:

• Failed to even lint the recipe (might be a conda-smithy bug) 😢

[conda-forge-linter]

Hi! This is the friendly automated conda-forge-linting service.

I wanted to let you know that I linted all conda-recipes in your PR (recipes/cvxcanon, recipes/cvxpy, recipes/scs) and found some lint.

Here's what I've got...

For recipes/cvxcanon:

• The recipe license should not include the word "License".

For recipes/cvxpy:

• Failed to even lint the recipe (might be a conda-smithy bug) 😢

[djsutherland]

Closing in favor of #6081 / #6076. Sorry this languished, @sebp. :/