chore(*): add mathlib4 synchronization comments (#19042)
Regenerated from the [port status wiki page](https://github.com/leanprover-community/mathlib/wiki/mathlib4-port-status).
Relates to the following files:
* `algebra.category.Mon.limits`
* `algebra.char_p.local_ring`
* `algebra.direct_sum.decomposition`
* `algebra.direct_sum.internal`
* `algebra.module.bimodule`
* `algebraic_topology.fundamental_groupoid.fundamental_group`
* `algebraic_topology.fundamental_groupoid.punit`
* `analysis.complex.operator_norm`
* `analysis.normed_space.affine_isometry`
* `analysis.normed_space.banach_steinhaus`
* `analysis.normed_space.completion`
* `analysis.normed_space.extend`
* `analysis.normed_space.multilinear`
* `analysis.special_functions.complex.arg`
* `analysis.special_functions.complex.log`
* `analysis.special_functions.pow.complex`
* `category_theory.bicategory.free`
* `category_theory.groupoid.free_groupoid`
* `category_theory.monoidal.free.coherence`
* `category_theory.monoidal.of_chosen_finite_products.basic`
* `category_theory.monoidal.types.basic`
* `data.matrix.kronecker`
* `data.nat.factorial.double_factorial`
* `data.polynomial.expand`
* `linear_algebra.matrix.is_diag`
* `linear_algebra.tensor_product.matrix`
* `linear_algebra.unitary_group`
* `number_theory.legendre_symbol.mul_character`
* `number_theory.multiplicity`
* `ring_theory.finite_presentation`
* `ring_theory.ideal.local_ring`
* `ring_theory.jacobson_ideal`
* `ring_theory.localization.at_prime`
* `ring_theory.matrix_algebra`
* `ring_theory.nakayama`
* `set_theory.game.pgame`
* `topology.category.TopCommRing`
* `topology.fiber_bundle.constructions`
* `topology.sheaves.limits`
* `topology.sheaves.presheaf`
* `topology.sheaves.presheaf_of_functions`
* `topology.sheaves.sheaf`
