feat(errors): added global error handler class

Add global error handler and set it as provider in main module

Could be a starting point for issue acadevmy#4

src/app/app.module.ts

@@ -1,4 +1,4 @@
-import { NgModule } from '@angular/core';
+import { NgModule, ErrorHandler } from '@angular/core';
 import { BrowserModule } from '@angular/platform-browser';
 
 import { CoreModule } from './core/core.module';
@@ -7,6 +7,7 @@ import { CommandModule } from './features/command/command.module';
 import { PatternModule } from './features/pattern/pattern.module';
 
 import { AppComponent } from '@app/app.component';
+import { GlobalErrorHandler } from './shared/handlers/global-error-handler';
 
 @NgModule({
   declarations: [
@@ -19,6 +20,12 @@ import { AppComponent } from '@app/app.component';
     CommandModule,
     PatternModule
   ],
-  bootstrap: [AppComponent]
+  bootstrap: [AppComponent],
+  providers: [
+    {
+      provide: ErrorHandler,
+      useClass: GlobalErrorHandler
+    }
+  ]
 })
 export class AppModule { }

src/app/shared/handlers/global-error-handler.ts

@@ -0,0 +1,10 @@
+import { ErrorHandler, Injectable} from '@angular/core';
+
+@Injectable()
+export class GlobalErrorHandler implements ErrorHandler {
+  constructor() { }
+
+  handleError(error: any): void {
+    console.log(error);
+    }
+}