State in documentation when certain `Project.toml` features were added

[fingolfin]

Looking at https://pkgdocs.julialang.org/v1/toml-files if there were some points of the form "Added in Pkg.jl version X / Julia version Y"

Like, I am now reading up on the [workspace] section and I think this is new in Julia 1.12? But maybe not?

I think this kind of info would be really useful to have.

Similar for e.g. [sources] which I think is also fairly new (added in Julia 1.11 perhaps?)

[ayushman1210]

hi @fingolfin i would like to contribute please assign it to me :)

[KristofferC]

We don't assign issues to people

[fingolfin]

Just submit a PR doing this :-)

[Sisira07]

Hi! I've added the version details for the [workspace] section. The version compatibility for the other sections have already been stated!

[gamila-wisam]

Hi @fingolfin,i have opened PR #4605 which adds a Julia version compatibility note for the [workspace] section.
All checks have passed, and the PR is ready for review. The note is placed directly under the section header for better visibility.
Thanks for the suggestion!