ot::Mle::MleRouter::NeighborHasComparableConnectivity() const method

Determines whether the Router ID Sequence in a received Route TLV is more recent than the current Router ID Sequence being used by `RouterTable`.

Updates the routes based on a received `RouteTlv` from a neighboring router.

Updates the routes on an FTD child based on a received `RouteTlv` from the parent. MUST be called when device is an FTD child and @p aRouteTlv is received from its current parent.

Fills a Route TLV. When @p aNeighbor is not `nullptr`, we limit the number of router entries to `kMaxRoutersInRouteTlvForLinkAccept` when populating `aRouteTlv`, so that the TLV can be appended in a Link Accept message. In this case, we ensure to include router entries associated with @p aNeighbor, leader, and this device itself.