feat: added data model and ui for main window

deps/deps.qrc

@@ -2,5 +2,11 @@
 <RCC version="1.0">
     <qresource prefix="/deps">
          <file alias="icon.png">icon.png</file>
+         <file alias="reload.png">reload.png</file>
+         <file alias="add.png">add.png</file>
+         <file alias="edit.png">edit.png</file>
+         <file alias="delete.png">delete.png</file>
+         <file alias="info.png">info.png</file>
+         <file alias="tables.ddl">tables.ddl</file>
     </qresource>
 </RCC>

deps/tables.ddl

@@ -0,0 +1,15 @@
+CREATE TABLE IF NOT EXISTS clients (
+    id INTEGER PRIMARY KEY AUTOINCREMENT,
+    city TEXT NOT NULL,
+    email TEXT NOT NULL,
+    firstName TEXT NOT NULL,
+    hardwareHash TEXT NOT NULL,
+    lastName TEXT NOT NULL,
+    patronymic TEXT NOT NULL,
+    phone TEXT NOT NULL,
+    yourCompany TEXT NOT NULL,
+    comment TEXT
+);
+
+COMMENT ON TABLE clients IS '';
+COMMENT ON FIELD clients.id IS '';