Add variance decomposition for pruned state space

• Closes #1836 (closed)
• Factorizes variance decomposition codes and moves files to subfolder
• Various cleanups

added estimation label

added 1 commit

• c97724e1 - Variance decomposition with pruning: add unit test

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added 1 commit

• 4e58e22b - Variance decomposition with pruning: add unit test

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added 4 commits

• 420cbc82 - kalman_transition_matrix.m: remove redundant input argument
• 2fa6c437 - solve_model_for_online_filter.m: remove redundant call to Lyapunov solver
• c43308a0 - forcst.m: remove redundant call to make_ex_
• cd05bfb8 - Remove unused ghx2transition.m

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marked this merge request as ready

merged

mentioned in commit d601ca4a