Add content types initial files

src/file/content-types/content-types-attributes.ts

@@ -0,0 +1,11 @@
+import { XmlAttributeComponent } from "file/xml-components";
+
+export interface IContentTypeAttributes {
+    xmlns?: string;
+}
+
+export class ContentTypeAttributes extends XmlAttributeComponent<IContentTypeAttributes> {
+    protected xmlKeys = {
+        xmlns: "xmlns",
+    };
+}

src/file/content-types/content-types.ts

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+import { XmlComponent } from "file/xml-components";
+import { ContentTypeAttributes } from "./content-types-attributes";
+
+export class ContentTypes extends XmlComponent {
+    constructor() {
+        super("Types");
+
+        this.root.push(
+            new ContentTypeAttributes({
+                xmlns: "http://schemas.openxmlformats.org/package/2006/content-types",
+            }),
+        );
+    }
+}

src/file/content-types/default/default.ts

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+import { XmlComponent } from "file/xml-components";
+
+export class Default extends XmlComponent {
+    constructor() {
+        super("Types");
+
+        this.root.push();
+    }
+}