[Emacs] Greatly simplify org conlang project

It's now a much simpler process to publish since I use Vuepress.

org/config/emacs.org

@@ -5433,17 +5433,14 @@ Another great features of Org-mode is the Org projects that allow the user to
 easily publish a bunch of org files to a remote location. Here is the current
 declaration of my projects, which will be detailed later:
 #+NAME: org-publish-projects
-#+BEGIN_SRC emacs-lisp :noweb yes
+#+BEGIN_SRC emacs-lisp :noweb yes :noweb-prefix no
 <<org-proj-config-setup>>
 <<org-proj-lang-setup>>
 (setq org-publish-project-alist
-      `(
-        <<org-proj-config-html>>
+      `(<<org-proj-config-html>>
         <<org-proj-config-static>>
         <<org-proj-config>>
-        <<org-proj-lang-html>>
-        <<org-proj-lang-pdf>>
-        <<org-proj-lang-static>>
+        <<org-proj-lang-md>>
         <<org-proj-lang>>))
 #+END_SRC
 
@@ -5526,113 +5523,48 @@ by individuals or by groups of individuals, unlike natural languages
 which evolve and appear naturally from other languages.
 #+end_info
 
-My conlanging website is made out of three projects. As for the
-previous project, let’s declare the common values for these.
+My conlanging website is made of only one project, exporting my org
+files to GitHub-flavored Markdown. As for the previous project, let’s
+declare a common value.
 #+NAME: org-proj-lang-setup
 #+BEGIN_SRC emacs-lisp
-(defvar phundrak//projects-conlanging-target
-  "/rsync:Tilo:~/www/phundrak.com/conlang"
-  "Points to where exported files for langue.phundrak.com should be put.")
-(defvar phundrak//projects-conlanging-source
-  "~/Documents/conlanging/content/"
-  "Points to where the sources for langue.phundrak.com are.")
-(defvar phundrak//projects-conlanging-language
-  "en"
-  "Language of langue.phundrak.com.")
-(defvar phundrak//projects-conlanging-recursive
-  t
-  "Defines whether subdirectories should be parsed for langue.phundrak.com.")
+(defvar phundrak--projects-conlanging-common-root
+  "~/org/conlanging/docs/"
+  "Points to the common root of my source and target for my
+conlang.phundrak.com org project.")
 #+END_SRC
 
-The first component is the one generating the HTML files from the org files.
-#+NAME: org-proj-lang-html
+The only component is the one generating the Markdown files from the
+org files.
+#+NAME: org-proj-lang-md
 #+BEGIN_SRC emacs-lisp
-("conlang-phundrak-com-html"
- :base-directory ,phundrak//projects-conlanging-source
+("conlang-phundrak-com-md"
+ :base-directory ,phundrak--projects-conlanging-common-root
  :base-extension "org"
  :exclude ,(rx (* print)
                (or "CONTRIB"
                    "README"
-                   "header"
+                   "site-map"
                    "temp"
                    "private"
                    "svg-ink")
                (* print))
- :publishing-directory ,phundrak//projects-conlanging-target
- :recursive ,phundrak//projects-conlanging-recursive
- :language ,phundrak//projects-conlanging-language
- :publishing-function org-html-publish-to-html
+ :publishing-directory ,phundrak--projects-conlanging-common-root
+ :recursive t
+ :language "en"
+ :publishing-function org-gfm-publish-to-gfm
  :headline-levels 5
- :auto-sitemap t
- :auto-preamble t)
-#+END_SRC
-
-We also have the component for the LaTeX and PDF part of the website:
-#+NAME: org-proj-lang-pdf
-#+BEGIN_SRC emacs-lisp
-("conlang-phundrak-com-pdf"
- :base-directory ,phundrak//projects-conlanging-source
- :base-extension "org"
- :exclude ,(rx (* print)
-               (or "CONTRIB"
-                   "README"
-                   "header"
-                   "temp"
-                   "index"
-                   "sitemap"
-                   "private"
-                   "svg-ink")
-               (* print))
- :publishing-directory ,phundrak//projects-conlanging-target
- :recursive ,phundrak//projects-conlanging-recursive
- :language ,phundrak//projects-conlanging-language
- :publishing-function org-latex-publish-to-pdf
- :headline-levels 5
- :auto-preamble t)
-#+END_SRC
-
-And lastly, we have the component for all the static files needed to run the
-website:
-#+NAME: org-proj-lang-static
-#+BEGIN_SRC emacs-lisp
-("conlang-phundrak-com-static"
- :base-directory ,phundrak//projects-conlanging-source
- :base-extension "png\\|jpg\\|gif\\|webp\\|svg\\|jpeg\\|ttf\\|woff\\|txt\\|epub"
- :publishing-directory ,phundrak//projects-conlanging-target
- :recursive ,phundrak//projects-conlanging-recursive
- :language ,phundrak//projects-conlanging-language
- :publishing-function org-publish-attachment)
+ :auto-sitemap nil
+ :auto-preamble nil)
 #+END_SRC
 
 The project is then defined like so:
 #+NAME: org-proj-lang
 #+BEGIN_SRC emacs-lisp
 ("conlang-phundrak-com"
- :components ("conlang-phundrak-com-org"
-              "conlang-phundrak-com-static"
-              "conlang-phundrak-com-pdf"))
+ :components ("conlang-phundrak-com-md"))
 #+END_SRC
 
-This project leaves a lot of junk files here and there. This is why I
-have this command to remove them easily.
-#+begin_src emacs-lisp
-(defun phundrak/clean-conlanging-directory ()
-  "Clean my conlanging directory from junk files."
-  (interactive)
-  (let ((files (directory-files-recursively phundrak//projects-conlanging-source
-                                            (rx (* print)
-                                                "."
-                                                (or "glo"
-                                                    "html"
-                                                    "ist"
-                                                    "tex"
-                                                    "pdf")))))
-    (mapc (lambda (file) (delete-file file))
-       (cl-remove-if (lambda (str)
-                       (string-match-p (regexp-quote "headers.tex") str))
-                     files))))
-#+end_src
-
 *** Org-ref and Bibtex configuration
 :PROPERTIES:
 :CUSTOM_ID: Packages-Configuration-Org-mode-org-ref-1h586cd085j0