Add yasnippet snippets for org-mode

etc/yasnippet/snippets/org-mode/latex-header-block

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+# -*- coding: utf-8 -*-
+# name: latex-header-block
+# key: lhb
+# expand-env: ((yas-indent-line 'fixed))
+# --
+#+begin_src latex :noweb yes :results raw
+  ,#+latex_header: <<${1:latex}-header>>
+#+end_src
+
+#+name: $1-header
+#+begin_src latex :exports none
+  % LaTeX PREAMBLE:
+  % See: https://list.orgmode.org/87o807r7fr.fsf@posteo.net/
+  % From: "Juan Manuel Macías" <maciaschain@posteo.net>
+  % To: orgmode <emacs-orgmode@gnu.org>
+  % Subject: [tip] Insert arbitrary LaTeX code at the beginning of any float environment
+  % Date: Sun, 08 May 2022 22:22:16 +0000
+  % Message-ID: <87o807r7fr.fsf@posteo.net>
+  % LANGUAGE:
+  \usepackage{babel}
+  \usepackage{fvextra}
+  \usepackage{csquotes}
+  % LISTS:
+  \usepackage{enumitem}
+  \setlist{noitemsep}
+  % CAPTIONS, LISTINGS, and SUBCAPTIONS
+  % Section 2.6 of caption-eng.pdf (texdoc caption) explains that the sign
+  % of "skip" depends on the assumption "position=above" or "position=below".
+  % The assumption should match the real caption position in the LaTeX code.
+  % Use the "DejaVu Sans Mono" as typewriter font for engrave-faces listings.
+  \usepackage{caption}
+  \captionsetup[listing]{position=below,skip=0em}
+  \setmonofont{DejaVu Sans Mono}[Scale=MatchLowercase]
+  \usepackage{subcaption}
+  % TABLES:
+  % https://tex.stackexchange.com/a/341254 answers:
+  % "How differ the environments tabular, tabular*, and tabularx?"
+  % https://emacs.stackexchange.com/a/28903 answers:
+  % "How to tweak org-mode table colors for latex export only?"
+  % https://tex.stackexchange.com/a/468596 answers:
+  % "How to format LaTeX using siunitx?"
+  % https://tex.stackexchange.com/a/355396 answers:
+  % "How to load colortbl and xcolor for maximal interoperability?"
+  \usepackage{booktabs}
+  \usepackage[table]{xcolor}
+  \usepackage{tabularx}  % DANGER: beware of Org table :width and :align options!
+  % STANDALONE FIGURES AND TABLES:
+  % https://xuc.me/blog/reuse-tikz-figures-in-articles-and-slides/ explains that
+  % making fake beamer commands for standalone pictures is less error-prone than
+  % using beamerarticle.
+  \usepackage{standalone}
+  \usepackage{xparse}
+  \NewDocumentCommand{\onslide}{s t+ d<>}{}
+  \NewDocumentCommand{\only}{d<>}{}
+  \NewDocumentCommand{\uncover}{d<>}{}
+  \NewDocumentCommand{\visible}{d<>}{}
+  \NewDocumentCommand{\invisible}{d<>}{}
+  % PAGE LAYOUT:
+  \usepackage[headheight=20mm,top=40mm,bottom=20mm,left=0.1\paperwidth,right=0.1\paperwidth,heightrounded,verbose]{geometry}
+  % SI UNITS:
+  \usepackage[load-configurations=abbreviations]{siunitx}
+  \sisetup{
+    range-phrase = \ensuremath{\text{\,\textendash\,}},
+    range-units = brackets,
+    separate-uncertainty,
+  }
+  \DeclareSIUnit\dollar{\$}
+  \DeclareSIUnit\euro{€}
+  \DeclareSIUnit\mK{\milli\kelvin}
+  \DeclareSIUnit\mbar{\milli\bar}
+  \DeclareSIUnit\micron{\micro\meter}
+  \DeclareSIUnit\nW{\nano\watt}
+  % TIKZ AND PGFPLOTS:
+  \usepackage{tikz}
+  \usetikzlibrary{3d,arrows,backgrounds,calc,plotmarks}
+  \usepackage{pgfplots}
+  \pgfplotsset{compat=newest}
+  \def\axisdefaultwidth{90mm}
+  \def\axisdefaultheight{75mm}
+  % SYMBOLS FOR FLUID MECHANICS
+  \newcommand{\Knudsen}{\mbox{\textit{Kn}}}
+  \newcommand{\Nusselt}{\mbox{\textit{Nu}}}
+  \newcommand{\Reynolds}{\mbox{\textit{Re}}}
+  % FLOAT BARRIERS:
+  % https://tex.stackexchange.com/a/118667 answers:
+  % "How to make float barriers for subsections as placeins does for sections?"
+  % 1. Make section an implicit float barrier:
+  \usepackage[section]{placeins}
+  % 2. Make subsection an implicit float barrier:
+  \makeatletter
+  \AtBeginDocument{%
+    \expandafter\renewcommand\expandafter\subsection\expandafter{%
+      \expandafter\@fb@secFB\subsection
+    }%
+  }
+  \makeatother
+  % 3. Make subsubsection an implicit float barrier:
+  \makeatletter
+  \AtBeginDocument{%
+    \expandafter\renewcommand\expandafter\subsubsection\expandafter{%
+      \expandafter\@fb@secFB\subsubsection
+    }%
+  }
+  \makeatother
+#+end_src

etc/yasnippet/snippets/org-mode/org-mode-article

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+# -*- coding: utf-8 -*-
+# name: org-mode-article
+# key: oma
+# expand-env: ((yas-indent-line 'fixed))
+# --
+#+options: ^:{} d:nil date:t num:t tags:nil title:t toc:t
+#+title: ${1:Catchy Title}
+#+author: ${2:Gerard Vermeulen}
+#+babel: :cache no
+#+property: header-args:python :eval no-export
+#+property: header-args:python+ :tangle ${3:`(file-name-sans-extension (file-name-nondirectory (buffer-file-name)))`}.py
+#+startup: showeverything
+#+cite_export: biblatex phys,biblabel=brackets,doi=true
+#+latex_class: article
+#+latex_class_options: [10pt,english,svgnames,table]
+$0
+
+* Local variables                                                  :noexport:
+
+# Emacs looks for "Local variables:" after the last "newline-formfeed".
+
+# Local Variables:
+# compile-command: "latexmk -interaction=nonstopmode -lualatex -pvc $3.tex"
+# eval: (org-eval-emacs-lisp-setup-blocks)
+# fill-column: 80
+# End:

etc/yasnippet/snippets/org-mode/smart-latex-engrave

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+# -*- coding: utf-8 -*-
+# name: smart-latex-engrave
+# key: sle
+# expand-env: ((yas-indent-line 'fixed))
+# --
+#+name: lst:smart-latex-engrave-emacs-lisp-setup
+#+begin_src emacs-lisp :exports none :results silent
+  (with-eval-after-load 'ox-latex
+    (make-variable-buffer-local 'org-export-filter-src-block-functions)
+    (add-to-list 'org-export-filter-src-block-functions
+                 'org-latex-engraved-source-block-filter)
+    (when (fboundp 'smart-latex-engrave-org-source-blocks)
+      (smart-latex-engrave-org-source-blocks)))
+#+end_src