vifm: Move devicon classify setting into separate file

Will be sourced on startup and provide basically the same icon prefix
as before. Made sure to not invoke 'classify+=' too often since each
invocation slows down vifm startup a little.
(see: https://github.com/vifm/vifm/issues/542)

With it being sourced externally we can now do fun things with classify
itself and it is easier to update from the rest of our settings.

terminal/.config/vifm/favicons.vifm

@@ -0,0 +1,88 @@
+" Ranger devicons for ViFM
+" https://github.com/cirala/vifm_devicons
+"
+" Filetypes/directories
+
+" Specific directories
+set classify+='  :dir:/,  :exe:,  :reg:,  :link:,?  :?:,  ::../::/,
+             \   ::.git/::/,
+             \   ::.config/,,Makefile::/,
+             \   ::Desktop/::/,
+             \   ::Documents/::/,
+             \   ::Development/::/,
+             \   ::Downloads/::/,
+             \   ::Dropbox/::/,
+             \   ::Nextcloud/::/,
+             \   ::Google\ Drive/::/,
+             \   ::gitrepos/::/,
+             \   ::Music/::/,
+             \   ::Pictures/::/,
+             \   ::Public/::/,
+             \   ::Templates/::/,
+             \   ::Videos/::/,
+             \   ::Zotero/::/,
+             \   ::node_modules/::/'
+
+" Specific files
+set classify+='  ::.Xdefaults,,.Xresources,,.bashprofile,,.bash_profile,,.bashrc,,.dmrc,,.d_store,,.fasd,,.gitconfig,,.gitignore,,.jack-settings,,.mime.types,,.nvidia-settings-rc,,.pam_environment,,.profile,,.recently-used,,.selected_editor,,.xinitpurc,,.zprofile,,.yarnc,,.snclirc,,.tmux.conf,,.urlview,,.config,,.ini,,.user-dirs.dirs,,.mimeapps.list,,.offlineimaprc,,.msmtprc,,.Xauthority,,config::/,
+            \   ::favicon.*,,README,,readme::/,
+            \   ::.vim,,.vimrc,,.gvimrc,,.vifm::/,
+            \   ::gruntfile.coffee,,gruntfile.js,,gruntfile.ls::/,
+            \   ::gulpfile.coffee,,gulpfile.js,,gulpfile.ls::/,
+            \   ::ledger,,*.beancount::/,
+            \   ::license,,copyright,,copying,,LICENSE,,COPYRIGHT,,COPYING::/,
+            \   ::react.jsx::'
+
+" File extensions
+set classify+='λ  ::*.ml,,*.mli::/,
+            \   ::*.styl::/,
+            \   ::*.scss::/,
+            \   ::*.py,,*.pyc,,*.pyd,,*.pyo::/,
+            \   ::*.php::/,
+            \   ::*.markdown,,*.md::/,
+            \   ::*.json::/,
+            \   ::*.js::/,
+            \   ::*.bmp,,*.gif,,*.ico,,*.jpeg,,*.jpg,,*.png,,*.svg,,*.svgz,,*.tga,,*.tiff,,*.xmb,,*.xcf,,*.xpm,,*.xspf,,*.xwd,,*.cr2,,*.dng,,*.3fr,,*.ari,,*.arw,,*.bay,,*.crw,,*.cr3,,*.cap,,*.data,,*.dcs,,*.dcr,,*.drf,,*.eip,,*.erf,,*.fff,,*.gpr,,*.iiq,,*.k25,,*.kdc,,*.mdc,,*.mef,,*.mos,,*.mrw,,*.obm,,*.orf,,*.pef,,*.ptx,,*.pxn,,*.r3d,,*.raf,,*.raw,,*.rwl,,*.rw2,,*.rwz,,*.sr2,,*.srf,,*.srw,,*.tif,,*.x3f,,*.webp,,*.avif,,*.jxl::/,
+            \   ::*.ejs,,*.htm,,*.html,,*.slim,,*.xml::/,
+            \   ::*.mustasche::/,
+            \   ::*.css,,*.less,,*.bat,,*.conf,,*.ini,,*.rc,,*.yml,,*.cfg::/,
+            \   ::*.rss::/,
+            \   ::*.coffee::/,
+            \   ::*.twig::/,
+            \   ::*.c++,,*.cpp,,*.cxx,,*.h::/,
+            \   ::*.cc,,*.c::/,
+            \   ::*.hs,,*.lhs::/,
+            \   ::*.lua::/,
+            \   ::*.jl::/,
+            \   ::*.go::/,
+            \   ::*.ts::/,
+            \   ::*.db,,*.dump,,*.sql::/,
+            \   ::*.sln,,*.suo::/,
+            \   ::*.exe::/,
+            \   ::*.diff,,*.sum,,*.md5,,*.sha512::/,
+            \   ::*.scala::/,
+            \   ::*.java,,*.jar::/,
+            \   ::*.xul::/,
+            \   ::*.clj,,*.cljc::/,
+            \   ::*.pl,,*.pm,,*.t::/,
+            \   ::*.cljs,,*.edn::/,
+            \   ::*.rb::/,
+            \   ::*.fish,,*.sh,,*.bash::/,
+            \   ::*.dart::/,
+            \   ::*.f#,,*.fs,,*.fsi,,*.fsscript,,*.fsx::/,
+            \   ::*.rlib,,*.rs::/,
+            \   ::*.d::/,
+            \   ::*.erl,,*.hrl::/,
+            \   ::*.ai::/,
+            \   ::*.psb,,*.psd::/,
+            \   ::*.jsx::/,
+            \   ::*.aac,,*.anx,,*.asf,,*.au,,*.axa,,*.flac,,*.m2a,,*.m4a,,*.mid,,*.midi,,*.mp3,,*.mpc,,*.oga,,*.ogg,,*.ogx,,*.ra,,*.ram,,*.rm,,*.spx,,*.wav,,*.wma,,*.ac3::/,
+            \   ::*.avi,,*.flv,,*.mkv,,*.mov,,*.mp4,,*.mpeg,,*.mpg,,*.webm,,*.av1::/,
+            \   ::*.epub,,*.pdf,,*.fb2,,*.djvu::/,
+            \   ::*.7z,,*.apk,,*.bz2,,*.cab,,*.cpio,,*.deb,,*.gem,,*.gz,,*.gzip,,*.lh,,*.lzh,,*.lzma,,*.rar,,*.rpm,,*.tar,,*.tgz,,*.xz,,*.zip,,*.zst::/,
+            \   ::*.cbr,,*.cbz::/,
+            \   ::*.log::/,
+            \   ::*.doc,,*.docx,,*.adoc::/,
+            \   ::*.xls,,*.xlsmx::/,
+            \   ::*.pptx,,*.ppt::/,
+            \   ::*.sqlite,,*.db::'