Ready to port

The following files have all dependencies ported already. Earlier items in the list are required in more places in mathlib.

`algebra.order.monoid.cancel.defs`
`algebra.abs`
`lean_core.data.vector`
`category_theory.functor.inv_isos`
`data.lazy_list`
`lean_core.data.buffer.parser`
`lean_core.data.dlist`
`data.mllist`

Maybe ready to port

The following files have their immediate dependencies ported already, and may be ready to port:

`algebra.group_power.lemmas`
`topology.subset_properties`
`algebra.order.module`
`linear_algebra.free_module.rank`
`category_theory.functor.left_derived`
`data.bitvec.basic`
`category_theory.abelian.projective`
`algebra.homology.short_exact.preadditive`
`probability.probability_mass_function.uniform`
`analysis.convex.proj_Icc`
`data.rat.meta_defs`	mathlib4#5934 c18a48e9
`data.fintype.small`
`combinatorics.set_family.ahlswede_zhang`
`measure_theory.order.upper_lower`

The following files are marked as ported, but do not have a SYNCHRONIZED WITH MATHLIB4 label.

`control.basic`
`control.monad.cont`
`control.monad.writer`
`control.traversable.derive`
`data.rbmap.default`
`data.rbmap.basic`
`data.buffer.basic`
`data.seq.parallel`
`data.seq.computation`
`data.seq.seq`
`data.seq.wseq`
`data.rbtree.insert`
`data.rbtree.init`
`data.rbtree.find`
`data.rbtree.main`
`data.rbtree.min_max`
`data.rbtree.default_lt`
`data.rbtree.basic`
`data.array.lemmas`
`linear_algebra.quadratic_form.dual`
`combinatorics.quiver.covering`
`algebraic_topology.dold_kan.equivalence`
`algebraic_topology.dold_kan.equivalence_pseudoabelian`

The following files are marked as ported, but have not been verified against a commit hash from mathlib.