latex, pdftex, tex, texdoc, texliveonfly, tlmgr: add page (#5294)

pages/common/tex.md

@@ -0,0 +1,16 @@
+# tex
+
+> Compile a DVI document from TeX source files.
+> More information: <https://www.tug.org/begin.html>.
+
+- Compile a DVI document:
+
+`tex {{source.tex}}`
+
+- Compile a DVI document, specifying an output directory:
+
+`tex -output-directory={{path/to/directory}} {{source.tex}}`
+
+- Compile a DVI document, halting on each error:
+
+`tex -halt-on-error {{source.tex}}`