Add Enzyme rules and move some logic into pullbacks

[kshyatt]

We can probably use these PB functions for ChainRules as well though I'm less familiar with that library, so I might need to ask someone else to do the plumbing :)

[codecov]

Codecov Report

❌ Patch coverage is 0% with 156 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
...orOperationsEnzymeExt/TensorOperationsEnzymeExt.jl	0.00%	82 Missing ⚠️
src/pullbacks/contract.jl	0.00%	28 Missing ⚠️
src/pullbacks/trace.jl	0.00%	20 Missing ⚠️
src/pullbacks/add.jl	0.00%	16 Missing ⚠️
...erationsMooncakeExt/TensorOperationsMooncakeExt.jl	0.00%	9 Missing ⚠️
src/utils.jl	0.00%	1 Missing ⚠️

Files with missing lines	Coverage Δ
ext/TensorOperationsChainRulesCoreExt.jl	0.00% <ø> (ø)
src/TensorOperations.jl	100.00% <ø> (ø)
src/utils.jl	0.00% <0.00%> (ø)
...erationsMooncakeExt/TensorOperationsMooncakeExt.jl	0.00% <0.00%> (ø)
src/pullbacks/add.jl	0.00% <0.00%> (ø)
src/pullbacks/trace.jl	0.00% <0.00%> (ø)
src/pullbacks/contract.jl	0.00% <0.00%> (ø)
...orOperationsEnzymeExt/TensorOperationsEnzymeExt.jl	0.00% <0.00%> (ø)

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.

[lkdvos]

I'll gladly update the chainrules implementation once we are happy with the names and signatures etc

[kshyatt]

Since I'm already modifying the Mooncake stuff let's also wait for Jutho/StridedViews.jl#19 to land so that we can test the complex stuff with those rules.