Move spatial tutorial from SciMLTutorials

[ChrisRackauckas]

Now that we have package docs for all of the packages and doctests, it makes sense for the tutorials to be built as part of the testing process. It also keeps everything organized by package. Thus SciMLTutorials is getting cannibalized into separate package docs, and this is the one for JumpProcesses. I did a few updates (DiffEqJump, LightGraphs, links) so hopefully this is enough. I might need a little bit of help getting this one completed though, since there are a few I need to tend to.

[ChrisRackauckas]

@Vilin97 @isaacsas

[isaacsas]

I can finish this one off.

[ChrisRackauckas]

Thanks, I'll just close the tab then and move onto the next!

[coveralls]

Pull Request Test Coverage Report for Build 3664935807

Warning: This coverage report may be inaccurate.

This pull request's base commit is no longer the HEAD commit of its target branch. This means it includes changes from outside the original pull request, including, potentially, unrelated coverage changes.

• For more information on this, see Tracking coverage changes with pull request builds.
• To avoid this issue with future PRs, see these Recommended CI Configurations.
• For a quick fix, rebase this PR at GitHub. Your next report should be accurate.

Details

• 0 of 0 changed or added relevant lines in 0 files are covered.
• 8 unchanged lines in 5 files lost coverage.
• Overall coverage increased (+0.4%) to 88.741%

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Files with Coverage Reduction	New Missed Lines	%
src/aggregators/prioritytable.jl	1	86.86%
src/extended_jump_array.jl	1	27.54%
src/jumps.jl	1	87.28%
src/coupling.jl	2	78.18%
src/spatial/spatial_massaction_jump.jl	3	85.45%
<!--	Total:	8		-->

Totals
Change from base Build 3544760886:	0.4%
Covered Lines:	1939
Relevant Lines:	2185

---

💛 - Coveralls

[ChrisRackauckas]

Looks like this just worked. Okay!

[isaacsas]

The tutorial needs some updates, but I can followup with those.