Modular LaTeX CV: scaffolding, 13 chapters, altacv styling

Replace the monolithic ODT with a modular LaTeX source tree that becomes
the canonical full CV:

- preamble.tex: altacv color/font overrides + compact-row macros
  (\cvrow, \cvgrant, \cvtalk, \cvalum, \cvpub) so dense lists keep
  baseline-aligned dates without the tabularx misalignment the
  custom v1 had.
- cv-full.tex: driver including the 13 chapters in order.
- chapters/*.tex: header, positions, education, grants, teaching,
  examinations, service, talks, collaborators, alumni, publications,
  products (solo-founded flyRoom + Berengar), software.
- tex-vendor/altacv.cls (v1.7.4): vendored, not in TeX Live.
- Makefile: dockerised xelatex build via texlive/texlive:latest,
  with TEXINPUTS=.:./tex-vendor: so the vendored class resolves.

Output: 6-page build/cv-full.pdf (down from 10 in the first pass).

cv-full.tex

@@ -0,0 +1,25 @@
+% ============================================================
+%  cv-full.tex  --  the complete CV (every chapter included)
+%  Compile with: make full   (uses Docker + XeLaTeX + altacv)
+% ============================================================
+\documentclass[10pt,a4paper,ragged2e,withhyper]{altacv}
+
+\input{preamble.tex}
+
+\begin{document}
+
+\input{chapters/header.tex}
+\input{chapters/positions.tex}
+\input{chapters/education.tex}
+\input{chapters/grants.tex}
+\input{chapters/teaching.tex}
+\input{chapters/examinations.tex}
+\input{chapters/service.tex}
+\input{chapters/talks.tex}
+\input{chapters/collaborators.tex}
+\input{chapters/alumni.tex}
+\input{chapters/publications.tex}
+\input{chapters/products.tex}
+\input{chapters/software.tex}
+
+\end{document}