feat(zsh): modularize Zsh configuration with environment variables, aliases, functions, and plugins

- Create a new Zsh configuration structure under ~/.config/zsh
- Add main .zshrc file to load configurations and plugins
- Implement environment variables in env.zsh
- Define aliases for common commands in aliases.zsh
- Set up completion settings in completion.zsh
- Add custom functions for navigation, file handling, and process management in functions.zsh
- Configure keybindings in keybindings.zsh
- Set shell options in options.zsh
- Load plugins using Zinit in plugins.zsh
- Configure prompt settings in prompt.zsh
- Create a .zshenv file to set ZDOTDIR for Zsh configuration directory

.gitignore

@@ -0,0 +1,34 @@
+# Shell history and dumps
+*/.zshdump
+*/.zcompdump
+*/.zsh_history
+*/.bash_history
+*/.history
+.zsh_history
+.zhistory
+.zcompdump
+
+# Config files
+*/.env
+*/.env.local
+
+# Editor config
+*/.vscode/
+*/.idea/
+
+# OS files
+*/.DS_Store
+*/Thumbs.db
+*/.zcompdump
+
+# SSH Keys
+*/.ssh/id_*
+*/.ssh/known_hosts*
+
+# Lock files
+*/.lock
+*/.pid
+*/.pid.lock
+*/.sock
+
+