Add fish config

airootfs/etc/skel/.config/fish/conf.d/fish_frozen_key_bindings.fish

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+# This file was created by fish when upgrading to version 4.3, to migrate
+# the 'fish_key_bindings' variable from its old default scope (universal)
+# to its new default scope (global).  We recommend you delete this file
+# and configure key bindings in ~/.config/fish/config.fish if needed.
+
+# set --global fish_key_bindings fish_default_key_bindings
+
+# Prior to version 4.3, fish shipped an event handler that runs
+# `set --universal fish_key_bindings fish_default_key_bindings`
+# whenever the fish_key_bindings variable is erased.
+# This means that as long as any fish < 4.3 is still running on this system,
+# we cannot complete the migration.
+# As a workaround, erase the universal variable at every shell startup.
+set --erase --universal fish_key_bindings

airootfs/etc/skel/.config/fish/conf.d/fish_frozen_theme.fish

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+# This file was created by fish when upgrading to version 4.3, to migrate
+# theme variables from universal to global scope.
+# Don't edit this file, as it will be written by the web-config tool (`fish_config`).
+# To customize your theme, delete this file and see
+#     help interactive#syntax-highlighting
+# or
+#     man fish-interactive | less +/^SYNTAX.HIGHLIGHTING
+# for appropriate commands to add to ~/.config/fish/config.fish instead.
+# See also the release notes for fish 4.3.0 (run `help relnotes`).
+
+set --global fish_color_autosuggestion 555 brblack
+set --global fish_color_cancel -r
+set --global fish_color_command blue
+set --global fish_color_comment red
+set --global fish_color_cwd green
+set --global fish_color_cwd_root red
+set --global fish_color_end green
+set --global fish_color_error brred
+set --global fish_color_escape brcyan
+set --global fish_color_history_current --bold
+set --global fish_color_host normal
+set --global fish_color_host_remote yellow
+set --global fish_color_normal normal
+set --global fish_color_operator brcyan
+set --global fish_color_param cyan
+set --global fish_color_quote yellow
+set --global fish_color_redirection cyan --bold
+set --global fish_color_search_match --background=111
+set --global fish_color_selection white --bold --background=brblack
+set --global fish_color_status red
+set --global fish_color_user brgreen
+set --global fish_color_valid_path --underline
+set --global fish_pager_color_completion normal
+set --global fish_pager_color_description B3A06D yellow -i
+set --global fish_pager_color_prefix cyan --bold --underline
+set --global fish_pager_color_progress brwhite --background=cyan
+set --global fish_pager_color_selected_background -r

airootfs/etc/skel/.config/fish/conf.d/nvm.fish

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+set --query XDG_DATA_HOME || set --local XDG_DATA_HOME ~/.local/share
+set --query nvm_mirror || set --global nvm_mirror https://nodejs.org/dist
+set --query nvm_data || set --global nvm_data $XDG_DATA_HOME/nvm
+
+function _nvm_install --on-event nvm_install
+    test ! -d $nvm_data && command mkdir -p $nvm_data
+    echo "Downloading the Node distribution index..." 2>/dev/null
+    _nvm_index_update
+end
+
+function _nvm_update --on-event nvm_update
+    set --query --universal nvm_data && set --erase --universal nvm_data
+    set --query --universal nvm_mirror && set --erase --universal nvm_mirror
+    set --query nvm_mirror || set --global nvm_mirror https://nodejs.org/dist
+end
+
+function _nvm_uninstall --on-event nvm_uninstall
+    command rm -rf $nvm_data
+
+    set --query nvm_current_version && _nvm_version_deactivate $nvm_current_version
+
+    set --names | string replace --filter --regex -- "^nvm" "set --erase nvm" | source
+    functions --erase (functions --all | string match --entire --regex -- "^_nvm_")
+end
+
+if status is-interactive && set --query nvm_default_version && ! set --query nvm_current_version
+    nvm use --silent $nvm_default_version
+end