chore/docs: Onboarding-Sprint für externe Mathematiker

- LICENSE: Copyright Tarik Moussa <Tarik.moussa95@gmail.com> (war user2595)
- CITATION.cff: maschinenlesbares Zitat mit 3 Primärreferenzen (Sechelmann 2016,
  Springborn 2020, Bobenko–Springborn 2004)
- scripts/try_it.sh: Clone→Build→Test→Beispiel in einem Skript
- doc/math/software-landscape.md: Landkarte aller relevanten Tools,
  Problem-A vs. Problem-B Abgrenzung, vollständige Feature-Matrix
- doc/math/novelty-statement.md: formales Alleinstellungsmerkmal,
  Zielgruppen, was dieses Projekt nicht ist
- code/CMakeLists.txt: cmake --install Target für Header-only-Library
- doc/getting-started.md: Testzähler 158→173, Beispiel-Output, try_it.sh
- README.md: CI/License/DOI-Badges, Cite-Abschnitt, Issue-Tracker-Link,
  Copyright, neue Doku-Einträge software-landscape + novelty-statement

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

README.md

@@ -1,5 +1,9 @@
 # conformallab++
 
+[![CI](https://git.eulernest.eu/conformallab/ConformalLabpp/actions/workflows/cpp-tests.yml/badge.svg)](https://git.eulernest.eu/conformallab/ConformalLabpp/actions)
+[![License: MIT](https://img.shields.io/badge/License-MIT-yellow.svg)](LICENSE)
+[![DOI](https://img.shields.io/badge/doi-Sechelmann%202016-blue)](https://depositonce.tu-berlin.de/items/8e2988b2-d991-45b5-aad5-9fb7988f3b2f)
+
 C++17 reimplementation of [ConformalLab](https://github.com/varylab/conformallab) —
 Stefan Sechelmann's Java research library for discrete conformal geometry (TU Berlin).
 The long-term goal is a **CGAL package** for discrete conformal maps.
@@ -91,6 +95,8 @@ Layout2D layout = euclidean_layout(mesh, res.x, maps);
 | **Declarative YAML pipeline** — concept, token vocabulary, 5 examples | [doc/concepts/declarative-pipeline.md](doc/concepts/declarative-pipeline.md) |
 | **Geometry modes** — Euclidean / Spherical / HyperIdeal comparison | [doc/math/geometry-modes.md](doc/math/geometry-modes.md) |
 | **References** — all papers by module | [doc/math/references.md](doc/math/references.md) |
+| **Software landscape** — how conformallab++ relates to libigl, CGAL, geometry-central | [doc/math/software-landscape.md](doc/math/software-landscape.md) |
+| **Novelty statement** — unique features, target audience, what this is not | [doc/math/novelty-statement.md](doc/math/novelty-statement.md) |
 | **Roadmap** — Phases 1–10 | [doc/roadmap/phases.md](doc/roadmap/phases.md) |
 | **Java parity table** — what is ported, what is planned | [doc/roadmap/java-parity.md](doc/roadmap/java-parity.md) |
 | **Contributing** — language policy, test standards, release flow | [doc/contributing.md](doc/contributing.md) |
@@ -98,7 +104,30 @@ Layout2D layout = euclidean_layout(mesh, res.x, maps);
 
 ---
 
+## Citing
+
+If you use conformallab++ in your research, please cite it using the metadata
+in [`CITATION.cff`](CITATION.cff).  GitHub and Codeberg show a "Cite this repository"
+button that generates BibTeX and APA automatically.
+
+The primary algorithmic source is:
+
+> Stefan Sechelmann — *Variational Methods for Discrete Surface Parameterization:
+> Applications and Implementation*, TU Berlin 2016.
+> DOI: [10.14279/depositonce-5415](https://depositonce.tu-berlin.de/items/8e2988b2-d991-45b5-aad5-9fb7988f3b2f)
+
+---
+
+## Bugs & questions
+
+- **Bug reports / feature requests:** [Gitea Issues](https://git.eulernest.eu/conformallab/ConformalLabpp/issues)
+- **Code mirror (read-only):** [Codeberg](https://codeberg.org/TMoussa/ConformalLabpp)
+- **Contact:** Tarik Moussa · Tarik.moussa95@gmail.com
+
+---
+
 ## License
 
 conformallab++ is released under the MIT License (see [LICENSE](LICENSE)).  
+Copyright © 2024–2026 Tarik Moussa.  
 The dissertation (Sechelmann 2016) is CC BY-SA 4.0.