libsysprof-analyze: add type to represent an embedded file

We have "chunks" within the capture file, this object will represent the
collection of those chunks which is easier for applications to deal with
if they want to view the contents.

src/libsysprof-analyze/sysprof-document-file.h

@@ -0,0 +1,39 @@
+/* sysprof-document-file.h
+ *
+ * Copyright 2023 Christian Hergert <chergert@redhat.com>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+
+#pragma once
+
+#include <glib-object.h>
+
+#include <sysprof-capture.h>
+
+G_BEGIN_DECLS
+
+#define SYSPROF_TYPE_DOCUMENT_FILE (sysprof_document_file_get_type())
+
+SYSPROF_AVAILABLE_IN_ALL
+G_DECLARE_FINAL_TYPE (SysprofDocumentFile, sysprof_document_file, SYSPROF, DOCUMENT_FILE, GObject)
+
+SYSPROF_AVAILABLE_IN_ALL
+const char *sysprof_document_file_get_path  (SysprofDocumentFile *self);
+SYSPROF_AVAILABLE_IN_ALL
+GBytes     *sysprof_document_file_dup_bytes (SysprofDocumentFile *self);
+
+G_END_DECLS