chore: remove 15 unused config directories and stale references

Drop config folders (aerospace, aqua, asdf, direnv, flipperdevices,
ghostty, htop, misc, nano, task, tealdeer, tms, wtf, yamlfmt,
yamllint) along with starship.toml, nbrc, and aerospace scripts/docs.

Clean up references in dfm, _dfm completions, bashrc, exports, and
exports-lakka to match.

config/zsh/completion/_dfm

@@ -28,7 +28,6 @@ _dfm()
 
   sections=(
     'install:Installation commands'
-    'asdf:ASDF version manager commands'
     'brew:Homebrew package manager commands'
     'check:System check commands'
     'dotfiles:Dotfiles management commands'
@@ -69,24 +68,6 @@ _dfm()
           _describe 'install commands' install_cmds
           ;;
 
-        asdf)
-          local -a asdf_cmds
-          asdf_cmds=(
-            'current:Show current versions'
-            'global:Show global versions'
-            'installed:Show installed versions'
-            'plugins-update:Update all plugins'
-            'plugins-install:Install plugins from configuration'
-            'plugins-remove:Remove installed plugins'
-            'reset:Reset plugins'
-            'fix-tool-versions:Remove uninstalled plugins from .tool-versions'
-            'versions:Show versions'
-            'where:Show where'
-            'which:Show which'
-          )
-          _describe 'asdf commands' asdf_cmds
-          ;;
-
         brew)
           local -a brew_cmds
           brew_cmds=(