feat: add, setup asdf, prepare plugins

Rakefile

@@ -40,6 +40,7 @@ task install: %i[submodule_init submodules] do
   Rake::Task['install_tools'].execute
   Rake::Task['install_prezto'].execute
   Rake::Task['install_spacevim'].execute
+  Rake::Task['install_asdf'].execute
 
   install_fonts
 
@@ -69,6 +70,17 @@ task :update_spacevim do
   )
 end
 
+desc 'install asdf'
+task :install_asdf do
+  run 'git clone https://github.com/asdf-vm/asdf.git ~/.asdf --branch v0.8.1'
+  install_files(Dir.glob('asdf/*')) if want_to_install?('tool version manager asdf')
+  run %(
+    . $HOME/.asdf/asdf.sh
+    asdf plugin-add kubetail https://github.com/janpieper/asdf-kubetail.git
+    asdf install
+  )
+end
+
 desc 'Install tools which are necessary for developers'
 task :install_tools do
   if macos?

asdf/tool-versions

@@ -0,0 +1 @@
+kubetail 1.6.13

zsh/prezto-override/zshrc

@@ -26,3 +26,5 @@ export NVM_DIR="$HOME/.nvm"
 
 # Add RVM to PATH for scripting. Make sure this is the last PATH variable change.
 export PATH="$PATH:$HOME/.rvm/bin"
+
+[ -s $HOME/.asdf/asdf.sh ] && . $HOME/.asdf/asdf.sh