Octopus merge

This is an Octopus Merge commit of the following branches:

wip/add-issue-template
wip/add_explicit_ports
wip/avoid-criticality-issue
wip/avoid_unordered_set
wip/disable-check-route-option
wip/faster_rr_graph_read
wip/inline_main_loop
wip/length_bounded
wip/lookahead_sampling2
wip/place-constraints
wip/refactor_heap2
wip/revert_clock_propigation
wip/rr-graph-binary-read-write
wip/symbiflow-badger
wip/use_expansion_for_place_delay

Signed-off-by: Keith Rothman <[email protected]>

Author: litghost