refactor: improve types and imports

src/types/Process.d.ts

@@ -1,5 +1,5 @@
 declare namespace NodeJS {
   export interface Process {
-    sessionController?: import('../controllers/session').SessionController
+    sessionController?: import('../controllers/Session').SessionController
   }
 }

src/types/Request.ts

@@ -1,4 +1,5 @@
 import { MacroVars } from '@sasjs/utils'
+
 export interface ExecutionQuery {
   _program: string
   macroVars?: MacroVars

src/types/Session.ts

@@ -1,7 +1,8 @@
 export interface Session {
   id: string
-  available: boolean
+  ready: boolean
   creationTimeStamp: string
   deathTimeStamp: string
   path: string
+  inUse: boolean
 }

src/types/index.ts

@@ -1,5 +1,5 @@
 // TODO: uppercase types
-export * from './sas'
-export * from './request'
-export * from './fileTree'
+export * from './Execution'
+export * from './Request'
+export * from './FileTree'
 export * from './Session'