vim,zathura: Setup LaTeX file development

LaTeX files can now be automatically compiled in vim and jumping into
the relevant lines from PDF to code or the other way around is possible
too.
Add the LaTeX coc-language server as well.

Thanks to @AurelWeinhold

.config/vim/vimtex.vim

@@ -0,0 +1,24 @@
+let g:tex_flavor = "latex"
+let g:vimtex_compiler_progname = 'nvr'
+
+" Setup latexmk and make callback possible with synctex
+" (Click into PDF to land in code)
+let g:vimtex_compiler_latexmk = {
+\	'build_dir' : 'build',
+\	'callback' : 1,
+\	'continuous' : 1,
+\	'executable' : 'latexmk',
+\	'hooks' : [],
+\	'options' : [
+\		'-verbose',
+\		'-file-line-error',
+\		'-synctex=1',
+\		'-interaction=nonstopmode',
+\		'-shell-escape',
+\	],
+\}
+
+" synctex needs to be activated in zathurarc as well
+let g:vimtex_context_pdf_viewer='zathura'
+let g:vimtex_view_general_viewer = 'zathura'
+let g:vimtex_view_method='zathura'