Eir Compile

- added COSNode::Replace(Existing-)Connection method to redraw the edges in the graph or remove them

- fixed the sub-graph notification on edge removal or replacement upon connected node movement or destruction using the new Eir SDK feature "eir::containNotify(Add-)RemoveTie"

- added suffix-support for integer and decimal-floating-point COS literals (f/F and u/U) + unit-tests

- transformed the COS nodes to support sub-graph extensions more appropriately

- quick bugfixes

- added system-variables support for DependencyNodeScheduler & GenericNodeIterator (see document: Importance of system variables in algorithms / data structures) + unit-tests

- added literals to COS + unit-tests
- added the ability to deny productions based on node configuration at detach/finish by throwing a lexing_invalid_parameter_exception inside of the DetachFinishedNode selector method + unit-tests
- added the ability to verify nodes for the direct_obj_build_selector using the VerifyNode static function

- adjusted the COS for-loop-statement so that init-statement, condition and iteration-operation are optional + unit-test

- added clean-up logic to COSEnvironment (should help clear things up a bit)

- added Graph Template Resolution Algorithm header (GTRA) + unit tests
- added useful methods to the GenericNodeIterator (SkipNodeChildEdges, MarkCurrentNode, etc)
- added node iterator unit tests for the new skip-feature

- added support for by-node visit-info storage (DependencyNodeScheduler extension)
- added DependencyNodeScheduler::MoveNodeVisitData method for changing node memory locations

- added DependencyNodeScheduler class to eircompile + unit tests
- restructured some headers

- added unit-tests for the GenericNodeScheduler using dependency-visit-semantics

- removed final from nodes to allow extension, providing room for specializations which introduce sub-graphs on the already-defined edges
- added OnSet-methods to nodes which notify the user about edge-changes, allowing for sub-graph updates based on the feedback

- added backlinks support for COSNode (each node knows which node points to it)
- adjusted the unit-tests to acknowledge the backlinks logic (nodes clean up pointers to themselves using backlink-awareness now)
- made a change to the way we specify ordered or unordered backlinks inside GenericNodeScheduler (type parameter for future fine-tuning)

- various improvements to CalculationGraph because of the new DTS features (the improvements decrease the overall complexity)

- fixed compilation of the DEBUG build by requiring /bigobj compiler command-line option (https://docs.microsoft.com/en-us/cpp/build/reference/bigobj-increase-number-of-sections-in-dot-obj-file?view=msvc-170)

- adjustments for the new Eir SDK revision

- added the empty statement to COS

- optimized away a memory allocation inside node scheduler visitation edge node-ptr updating

- fixed an issue in the node scheduler data-structure where node backlink-ptrs were not updated when the node announced movement of it's memory pointer

- bugfixes for the GC logic of COS and in general (selectors)
- added GC runtime to the COS lexer
- fixed a bug in the GenericNodeScheduler class where removing root-status of nodes would turn them UNVISITED even though demanded SCHEDULED by awaiting edges (CHALLENGER or COUNTED) + unit test expansion

This revision is not stable but contains important progress.

- finished-up the GC support for the COS lexer
- some fixes for the direct_obj_build_selector related to the GC ref management

- made progress for the GC-support of COSNode-derived objects
- ported the lexer code to the setter-and-getter API of COSNode-derived objects
- ported the unit tests to the new API

- implemented the COS::EnumDefinition iteration over connections using eir::MultiValueStore

- (partially) implemented the GC-exactly-once-discovery logic for the COS nodes; still have to implement it for the COS::EnumDefinition node

- fixed refPtr logic of lexing structures (lexing env and std-compiler)
- added commonlangs project which is used to store common language definitions such as COS (Lua will be added at a later date)

- added COS descriptive declarations unit tests

- added COS initialized declaration unit tests

- fixed a bug in the Eir lexer where preemptive-returns were not handled according to spec; now all preemptive returns use the proper logic
- added template-instantiation unit tests for COS
- fixed function-declaration handling related to locators and array-specs shrouding the funcsig type
- improved the performance even more thanks to the new Eir SDK revision