tgui reagent guidebook & tgui updates (#6161)

Co-authored-by: silicons <no@you.cat>

code/modules/guidebook/guidebook_section.dm

@@ -0,0 +1,27 @@
+//* This file is explicitly licensed under the MIT license. *//
+//* Copyright (c) 2023 Citadel Station developers.          *//
+
+/datum/prototype/guidebook_section
+	abstract_type = /datum/prototype/guidebook_section
+
+	/// section title
+	var/title = "Unknown"
+	/// tgui guidebook module to load
+	var/tgui_module
+
+/**
+ * data to be sent to module - static
+ *
+ * this is the only one, for now
+ *
+ * todo: add dynamic data support???
+ */
+/datum/prototype/guidebook_section/proc/section_data()
+	. = list()
+
+/datum/prototype/guidebook_section/proc/interface_data()
+	return list(
+		"$tgui" = tgui_module,
+		"$src" = REF(src),
+		"title" = title,
+	) | section_data()