gladtex: add page (#10892)

* gladtex: add page

* gladtex: update command description

Co-authored-by: Reinhart Previano Koentjoro <reinhart_previano@yahoo.com>

* gladtex: update placeholder

Co-authored-by: Reinhart Previano Koentjoro <reinhart_previano@yahoo.com>

* gladtex: update placeholders

Co-authored-by: Reinhart Previano Koentjoro <reinhart_previano@yahoo.com>

* gladtex: update placeholder

Co-authored-by: Reinhart Previano Koentjoro <reinhart_previano@yahoo.com>

* gladtex: update placeholder

Co-authored-by: Reinhart Previano Koentjoro <reinhart_previano@yahoo.com>

* gladtex: update command description

Co-authored-by: Reinhart Previano Koentjoro <reinhart_previano@yahoo.com>

* gladtex: update command description

Co-authored-by: Reinhart Previano Koentjoro <reinhart_previano@yahoo.com>

* gladtex: update command description

Co-authored-by: Reinhart Previano Koentjoro <reinhart_previano@yahoo.com>

* gladtex: update placeholder

Co-authored-by: Reinhart Previano Koentjoro <reinhart_previano@yahoo.com>

* gladtex: update placeholder

Co-authored-by: Reinhart Previano Koentjoro <reinhart_previano@yahoo.com>

* Apply suggestions from code review

Co-authored-by: Reinhart Previano Koentjoro <reinhart_previano@yahoo.com>

* Update pages/common/gladtex.md

---------

Co-authored-by: Reinhart Previano Koentjoro <reinhart_previano@yahoo.com>
Co-authored-by: K.B.Dharun Krishna <kbdharunkrishna@gmail.com>

pages/common/gladtex.md

@@ -0,0 +1,33 @@
+# gladtex
+
+> A LaTeX formula preprocessor for HTML files.
+> It converts LaTeX formulas to images.
+> More information: <https://humenda.github.io/GladTeX/manpage.html/>.
+
+- Convert to html:
+
+`gladtex {{path/to/input.htex}}`
+
+- Save the converted file to a specific location:
+
+`gladtex {{path/to/input.htex}} -o {{path/to/output.html}}`
+
+- Save the generated images to a specific [d]irectory:
+
+`gladtex {{path/to/input.htex}} -d {{path/to/image_output_directory}}`
+
+- Set image [r]esolution (in dpi, default is 100):
+
+`gladtex {{path/to/input.htex}} -r {{resolution}}`
+
+- [k]eep LaTeX files after conversion:
+
+`gladtex {{path/to/input.htex}} -k`
+
+- Set [b]ackground and [f]oreground color of the images:
+
+`gladtex {{path/to/input.htex}} -b {{background_color}} -f {{foreground_color}}`
+
+- Convert Markdown to HTML using `pandoc` and `gladtex`:
+
+`pandoc -s -t html --gladtex {{path/to/input.md}} | gladtex -o {{path/to/output.html}}`