Change file structure to align with project

src/nodeClass.js

@@ -1,4 +1,4 @@
-const { Reactor_CSTR, Reactor_PFR } = require('./reactor_class.js');
+const { Reactor_CSTR, Reactor_PFR } = require('./specificClass.js');
 
 
 class nodeClass {

src/specificClass.js

@@ -1,4 +1,4 @@
-const ASM3 = require('./asm3_class.js');
+const ASM3 = require('./reaction_modules/asm3_class.js');
 const { create, all } = require('mathjs');
 const { assertNoNaN } = require('./utils.js');