Add 1-page short CV variant, ORCID, profile photo, pre-commit hook

- cv-short.tex: two-column paracol layout (66/34) with curated content
  in the left column and an "at a glance" sidebar on the right.
  Locally tightens parskip, \cvsection and \cvevent so everything fits
  on a single A4 page, and redefines the sidebar list helper \sbitem
  to replace altacv's non-wrapping tikz \cvtag in the narrow column.
- chapters/short/{current,education,grants-selected,products,
  pubs-selected,sidebar}.tex: hand-curated highlight content
  (top 6 publications, top 6 grants, condensed two-line products,
  stats + recognition + leadership + research-focus sidebar blocks).
- chapters/header.tex / preamble.tex: ORCID 0000-0001-7512-8541
  via a new \orcid info field (faOrcid icon); blog field for
  giorgio.gilest.ro.
- images/gilestro.png: profile photo, used only by the short CV via
  altacv's circular \photoR.
- hooks/pre-commit + `make install-hooks`: rebuilds every variant on
  any .tex/.cls/Makefile change, aborts the commit on build failure,
  and stages refreshed PDFs into pdf/.
- Makefile: short target, hook-install target, dep glob extended to
  chapters/short/*.tex so the short build refreshes when its sources
  change.

hooks/pre-commit

@@ -0,0 +1,43 @@
+#!/usr/bin/env bash
+# Pre-commit hook: rebuild every CV variant whenever LaTeX sources change.
+#
+# Activated via:    git config core.hooksPath hooks
+# (or run once:     make install-hooks)
+#
+# Behaviour:
+#   - Only fires when staged changes touch .tex sources, the Makefile,
+#     or the vendored .cls. Other commits skip the rebuild.
+#   - Runs `make all` (i.e. cv-full + cv-short).
+#   - Aborts the commit if the build fails.
+#   - Copies the rebuilt PDFs to ./pdf/ (tracked) and stages them so each
+#     commit ships with up-to-date PDFs alongside the source.
+
+set -euo pipefail
+
+# Skip if no staged file matches a "build input" pattern.
+STAGED=$(git diff --cached --name-only --diff-filter=ACMR || true)
+if ! echo "$STAGED" | grep -qE '\.(tex|cls)$|^Makefile$'; then
+    exit 0
+fi
+
+echo "[pre-commit] LaTeX source changed -- rebuilding all CV variants..."
+
+# Build everything. `make all` covers full + short.
+if ! make all >/tmp/cv-build.log 2>&1; then
+    echo "[pre-commit] BUILD FAILED -- commit aborted." >&2
+    echo "[pre-commit] See /tmp/cv-build.log for details." >&2
+    tail -30 /tmp/cv-build.log >&2
+    exit 1
+fi
+
+# Publish the rebuilt PDFs to the tracked ./pdf/ directory and stage them.
+mkdir -p pdf
+for variant in cv-full cv-short; do
+    if [[ -f "build/${variant}.pdf" ]]; then
+        cp "build/${variant}.pdf" "pdf/${variant}.pdf"
+        git add "pdf/${variant}.pdf"
+    fi
+done
+
+echo "[pre-commit] Rebuild OK, pdf/ updated and staged."
+exit 0