New version: IMAS v7.0.0

[JuliaRegistrator]

• Registering package: IMAS
• Repository: https://github.com/ProjectTorreyPines/IMAS.jl
• Created by: @bclyons12
• Version: v7.0.0
• Commit: 7a52a09f2ac6f01a35538475fa1ac526c32044ef
• Reviewed by: @bclyons12
• Reference: ProjectTorreyPines/IMAS.jl@7a52a09#commitcomment-175312620
• Description: Physics, engineering, math and plotting on top of IMASDD.jl
• Release notes:

## What's Changed

* Adds a convenient dispatch for `trace_simple_surfaces`. by @mgyoo86 in https://github.com/ProjectTorreyPines/IMAS.jl/pull/282
* Fix incorrect ion mass in total source and total flux by @bclyons12 in https://github.com/ProjectTorreyPines/IMAS.jl/pull/284
* Implement new fast thermalization source-helium by @nanshi1177 in https://github.com/ProjectTorreyPines/IMAS.jl/pull/285
* Bug fix: fusion source was always deleted before recalculating by @bclyons12 in https://github.com/ProjectTorreyPines/IMAS.jl/pull/289
* Changes to sawteeth source behavior by @bclyons12 in https://github.com/ProjectTorreyPines/IMAS.jl/pull/290

## Breaking changes

- `sources!` renamed to `intrinsic_sources!`

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