Add asdf as version manager (#2)

* feat(asdf): add new version manager asdf

* feat(asdf): replace nvm with asdf

* feat(asdf): replace rbenv with asdf

* chore: add aliases for git

* feat(asdf): replace pyenv with asdf

* feat(asdf): add asdf as version manager for rust

* chore: shorten comments

* feat(asdf): add asdf as deno version manager

* feat(asdf): add direnv plugin and setup shell

* chore(asdf): move configuration in folder

asdf/default-npm-packages

@@ -0,0 +1,31 @@
+@fsouza/prettierd
+a11y
+alex
+babel-cli
+browser-sync
+caniuse-cmd
+commitizen
+cz-conventional-changelog
+eslint
+eslint_d
+fast-cli
+gifify
+github-codeowners
+json-server
+jsonlint
+lighthouse
+markdownlint-cli
+neovim
+netlify-cli
+npm-check
+npm-check-updates
+pageres-cli
+pageres-cli
+prettier
+prettier-init
+prettier-stylelint
+prettier_d_slim
+prettyjson
+typesync
+write-good
+yarn