Refactor to installable MVC/MIS package with unified solver API (#2)

* Add installable src package with MVC/MIS solver API

Co-authored-by: fgfuchs <2428162+fgfuchs@users.noreply.github.com>

* Fix review feedback and harden quantum/classical API details

Co-authored-by: fgfuchs <2428162+fgfuchs@users.noreply.github.com>

* Add QEG-LDF algorithm and API wiring

Co-authored-by: fgfuchs <2428162+fgfuchs@users.noreply.github.com>

* Refine QEG-LDF validation and deterministic relabeling

Co-authored-by: fgfuchs <2428162+fgfuchs@users.noreply.github.com>

* Refactor solver internals for cleaner maintainable structure

Co-authored-by: fgfuchs <2428162+fgfuchs@users.noreply.github.com>

* Remove duplicate MVC notebook copy files

Co-authored-by: fgfuchs <2428162+fgfuchs@users.noreply.github.com>

* Remove legacy MVC folder and update README scope

Co-authored-by: fgfuchs <2428162+fgfuchs@users.noreply.github.com>

* Simplify API surface and add notebook example

Co-authored-by: fgfuchs <2428162+fgfuchs@users.noreply.github.com>

* Simplify package and add notebook-first usage example

Co-authored-by: fgfuchs <2428162+fgfuchs@users.noreply.github.com>

---------

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: fgfuchs <2428162+fgfuchs@users.noreply.github.com>

Author: Copilot

.gitignore

@@ -0,0 +1,4 @@
+__pycache__/
+*.py[cod]
+*.egg-info/
+.pytest_cache/