Initial (buggy) implementation

- Implements modular computers, starting with single program (power monitoring console)
- Implements most hardware. Some is still TBD, but the important stuff is in place
- Implements file-based system. Currently two file types exist, programs, which have NanoUI/Topic() interaction with user and data files, which may be used to store string of data.

code/modules/modular_computers/file_system/computer_file.dm

@@ -0,0 +1,18 @@
+/datum/computer_file/
+	var/filename = "NewFile" 						// Placeholder. No spacebars
+	var/filetype = "XXX" 							// File full names are [filename].[filetype] so like NewFile.XXX in this case
+	var/size = 1									// File size in GQ (default 1, do not change unless you really have to). Non-1 values are currently unused but they should be supported.
+	var/datum/computer_hardware/hard_drive/holder	// Holder that contains this file.
+	var/icon_path = null							// !!32x32!! icon of this program
+
+
+/datum/computer_file/Destroy()
+	if(!holder)
+		return ..()
+
+	holder.stored_files -= src
+	// holder.holder is the computer that has drive installed. If we are Destroy()ing program that's currently running kill it.
+	if(holder.holder && holder.holder.active_program == src)
+		holder.holder.kill_program(1)
+	holder = null
+	..()