Add norm ball projections

[matbesancon]

Add closed-form norm ball projections

[matbesancon]

details for L1 here:
https://angms.science/doc/CVX/Proj_l1.pdf

[matbesancon]

note that the projection onto norm balls is easier than the projection onto cones

[matbesancon]

@JuliaRegistrator register()

[JuliaRegistrator]

Registration pull request created: JuliaRegistries/General/39371

After the above pull request is merged, it is recommended that a tag is created on this repository for the registered package version.

This will be done automatically if the Julia TagBot GitHub Action is installed, or can be done manually through the github interface, or via:

git tag -a v0.1.2 -m "<description of version>" 8516d5f78110c9579e7d90a67b693231b402e1c5
git push origin v0.1.2

[matbesancon]

@JuliaRegistrator register()

[JuliaRegistrator]

Registration pull request created: JuliaRegistries/General/47667

After the above pull request is merged, it is recommended that a tag is created on this repository for the registered package version.

This will be done automatically if the Julia TagBot GitHub Action is installed, or can be done manually through the github interface, or via:

git tag -a v0.1.3 -m "<description of version>" d6155d3e612bd12f7175453ed3117eb6468ebff6
git push origin v0.1.3