refactor: reorganize .zshenv with improved path management

- Add helper function add_to_path() for cleaner PATH manipulation
- Group environment variables by category with clear section comments
- Uncomment /usr/local/sbin path addition
- Add EDITOR and VISUAL environment variables for nvim
- Remove unnecessary comment lines and improve formatting

Author: Daniel Lindegren

common/.zshenv

@@ -1,41 +1,43 @@
-#
 # ~/.zshenv
-#
-if [ -d "$HOME/.bin" ]; then
-    export PATH="$HOME/.bin:$PATH"
-fi
-
-if [ -d "$HOME/.android/android-sdk/platform-tools" ]; then
-    export PATH="$HOME/.android/android-sdk/platform-tools:$PATH"
-fi
-
-if [ -d "/Applications/Visual Studio Code.app/Contents/Resources/app/bin" ]; then
-    export PATH="/Applications/Visual Studio Code.app/Contents/Resources/app/bin:$PATH"
-fi
-
-#if [ -d "/usr/local/sbin" ]; then
-#    export PATH="/usr/local/sbin:$PATH"
-#fi
 
+# ---------------------------------
+# Path Configuration
+# ---------------------------------
+
+# Function to safely add directories to PATH
+add_to_path() {
+  if [ -d "$1" ]; then
+    export PATH="$1:$PATH"
+  fi
+}
+
+# Add directories to PATH
+add_to_path "$HOME/.bin"
+add_to_path "$HOME/.android/android-sdk/platform-tools"
+add_to_path "/Applications/Visual Studio Code.app/Contents/Resources/app/bin"
+add_to_path "/usr/local/share/python"
+add_to_path "$HOME/.poetry/bin"
+add_to_path "$HOME/homebrew/bin"
+
+# ---------------------------------
+# Development Environment Variables
+# ---------------------------------
+
+# NVM configuration
 if [ -d "$HOME/.nvm" ]; then
-    export NVM_DIR="$HOME/.nvm"
+  export NVM_DIR="$HOME/.nvm"
 fi
 
-if [ -d "/usr/local/share/python" ]; then
-    export PATH="/usr/local/share/python:$PATH"
-fi
-
-if [ -d "$HOME/.poetry/bin" ]; then
-    export PATH="$HOME/.poetry/bin:$PATH"
-fi
-
-if [ -d "$HOME/homebrew/bin" ]; then
-    export PATH="$HOME/homebrew/bin:$PATH"
-fi
-
-# Configuration for virtualenv
+# Python virtualenv configuration
 export WORKON_HOME=$HOME/.virtualenvs
 export VIRTUALENVWRAPPER_PYTHON=/usr/local/bin/python3
 export VIRTUALENVWRAPPER_VIRTUALENV=/usr/local/bin/virtualenv
 
+# Package configuration
 export PKG_CONFIG_PATH=$PKG_CONFIG_PATH:/usr/local/Cellar/zlib/1.2.11/lib/pkgconfig/
+
+# ---------------------------------
+# Editor Configuration
+# ---------------------------------
+export EDITOR="nvim"
+export VISUAL="nvim"