Integrate OAT and SIU with Waypoints (#1060)

Integrate OAT and SIU with Waypoints (#1060)

* Integrate OAT and SIU with Waypoints

* Type corrections, convert set_value() overload to nullptr* check

* #1062 Fix core dump when merging tracks with disparate IGC extensions

* Reduce `value` variable scope when writing SimpleArrays

* Debug oopsie bugfix, fix core dump when merging IGC files with no extensions

* Collapse redundant if statement

* Fix brain fart

* Eliminate igc_fsdata::has_value()

* Fix subtle satellite count bug

* Fix small sat count bug, and eliminate some ifdefs

* Make some IGC exts override default WP members

* Include IGC line-by-line debug info

* Remove accidentally included file

* delete obsolete macros

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Co-authored-by: tsteven4 <13596209+tsteven4@users.noreply.github.com>