Reorganize context/states/selectors in dedicated folders (#1205)

* Reorganize context/states/selectors in dedicated folders

* linter

front/src/modules/activities/states/TasksContext.ts

@@ -1,3 +0,0 @@
-import { createContext } from 'react';
-
-export const TasksContext = createContext<string | null>(null);

front/src/modules/activities/states/recoil-scope-contexts/TasksRecoilScopeContext.ts

@@ -0,0 +1,3 @@
+import { createContext } from 'react';
+
+export const TasksRecoilScopeContext = createContext<string | null>(null);