feat: add more strings

src/app/strings.ts

@@ -1,13 +1,17 @@
 export const strings = Object.freeze({
+  actions: 'actions',
   add: 'add',
   addContact: 'add a contact',
   allFieldRequired: 'all fields are required',
   company: 'company',
+  constacts: 'contacts',
   contactList: 'contact list',
-  name: 'name',
+  editContact: 'edit contact',
-  phone: 'phone',
-  errorMessageRequired: 'This field is required.',
   errorMessageMaxLength: (maxLen: number) => `Must be ${maxLen} characters or fewer.`,
   errorMessageMinLength: (minLen: number) => `Must be at least ${minLen} characters long.`,
   errorMessagePhonePattern: `Valid format: + (optional) plus 12 to 15 digits`,
+  errorMessageRequired: 'This field is required.',
+  name: 'name',
+  phone: 'phone',
+  searchContactPlaceholder: 'Search contact...'
 });