Martin burgers

[schreiberx]

Added playground.
Three different differential equations with analytical solutions:

• Burgers
• Dahlquist
• Modified Dahlquist
  Added time integrators:
• RK1 (forward Euler)
• RK2 (Heun)
• RK4 (classical)
• Special variant of SDC.

[tlunet]

main has been updated with the new qmat.solvers subpackage and qmat.playgrounds infrastructure. Could you eventually merge upstream/main into your PR branch, to assert that there is no conflicts ?

I tried to do it on codespace, but I don't have any right on your fork to do that 😅

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 100.00%. Comparing base (c4a1b1c) to head (a2c6575).

Additional details and impacted files

@@            Coverage Diff            @@
##              main       #20   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files           19        19           
  Lines         2088      2088           
=========================================
  Hits          2088      2088           

Flag	Coverage Δ
smart-tests	100.00% <ø> (ø)

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