Make terminal work in vscode and beyond

This has been a pain since this repo was created, but it turns out the
bug is related to antigen application. If we apply everytime, we ensure
oh-my-zsh is loaded correctly and themes work. While we're here, I also
sourced the nvm plugin from oh-my-zsh, and removed and removed avn.

zsh/themes/sparkle.zsh-theme

@@ -0,0 +1,26 @@
+function ssh_connection() {
+  if [[ -n $SSH_CONNECTION ]]; then
+    return "${BOLD_MAGENTA}(ssh) "
+  fi
+}
+
+BOLD_MAGENTA="%{%B%F{magenta}%}"
+BOLD_YELLOW="%{%B%F{yellow}%}"
+BOLD_GREY="%{%B%F{#566573}%}"
+BOLD_WHITE="%{%B%F{white}%}"
+BOLD_RED="%{%B%F{red}%}"
+CLEAR="%{%f%k%b%}"
+
+
+PROMPT='%{$(ssh_connection)%}'
+PROMPT+="✨ "
+PROMPT+="${BOLD_YELLOW}%c${CLEAR} "
+PROMPT+='$(git_prompt_info)'
+PROMPT+="${BOLD_GREY}[%?] "
+PROMPT+="${BOLD_WHITE}# "
+PROMPT+="${CLEAR}"
+
+ZSH_THEME_GIT_PROMPT_PREFIX="${BOLD_RED}<"
+ZSH_THEME_GIT_PROMPT_SUFFIX="> ${CLEAR}"
+ZSH_THEME_GIT_PROMPT_DIRTY=":✘"
+ZSH_THEME_GIT_PROMPT_CLEAN=":✔"

zshrc

@@ -2,20 +2,15 @@
 
 source ~/.zsh/antigen/bin/antigen.zsh
 
-if [[ $ANTIGEN_APPLIED != true ]]; then
-  antigen use oh-my-zsh
-  antigen bundle git
-  antigen bundle zsh-users/zsh-autosuggestions
-  antigen bundle zsh-users/zsh-syntax-highlighting
-  antigen apply
-fi
-export ANTIGEN_APPLIED=true
-
-source ~/.zsh/themes/sparkle.zsh
+antigen use oh-my-zsh
+antigen bundle git
+antigen bundle nvm
+antigen bundle zsh-users/zsh-completions
+antigen bundle zsh-users/zsh-autosuggestions
+antigen bundle zsh-users/zsh-syntax-highlighting
+antigen apply
 
+source ~/.zsh/themes/sparkle.zsh-theme
 source ~/.bashrc
 
-source ~/.zsh/nvm-hook
-
 [[ -f ~/.zshrc.local ]] && source ~/.zshrc.local
-[[ -s "$HOME/.avn/bin/avn.sh" ]] && source "$HOME/.avn/bin/avn.sh" # load avn