refactor: Replace root_config initialization with config.root usage

src/commands/mapping_create.cr

@@ -5,12 +5,48 @@ module GX::Commands
     def initialize(@config : GX::Config) # FIXME
       @config.load_from_env
       @config.load_from_file
-      @file_system_manager = FileSystemManager.new(@config)
     end
 
     def execute
-      # FIXME: implement
-      puts "mapping create yo!"
+      # Assuming create_args is passed to this command with necessary details
+      create_args = @config.create_args
+
+      # Validate required arguments
+      if create_args[:name].empty? || create_args[:path].empty?
+        raise ArgumentError.new("Name and path are required to create a mapping.")
+      end
+
+      # Create the appropriate filesystem config based on the type
+      filesystem_config = case create_args[:type]
+      when "gocryptfs"
+        GX::Models::GocryptfsConfig.new(
+          name: create_args[:name],
+          path: create_args[:path],
+          encrypted_path: create_args[:encrypted_path]
+        )
+      when "sshfs"
+        GX::Models::SshfsConfig.new(
+          name: create_args[:name],
+          path: create_args[:path],
+          remote_user: create_args[:remote_user],
+          remote_host: create_args[:remote_host],
+          remote_path: create_args[:remote_path],
+          remote_port: create_args[:remote_port]
+        )
+      when "httpdirfs"
+        GX::Models::HttpdirfsConfig.new(
+          name: create_args[:name],
+          path: create_args[:path],
+          url: create_args[:url]
+        )
+      else
+        raise ArgumentError.new("Unsupported mapping type: #{create_args[:type]}")
+      end
+
+      # Append the new filesystem config to the root config
+      @config.root.try &.filesystems << filesystem_config
+
+      puts "Mapping '#{create_args[:name]}' created and added to configuration successfully."
     end
 
     def self.handles_mode