libsysprof-analyze: move timespan to analyze library

That way we can use it for the document itself, and have it update the
timespan of the recording in case it didn't get updated due to ctrl+c or
something prematurely stopping.

src/libsysprof-analyze/sysprof-time-span.h

@@ -0,0 +1,44 @@
+/* sysprof-time-span.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_TIME_SPAN (sysprof_time_span_get_type())
+
+typedef struct _SysprofTimeSpan
+{
+  gint64 begin_nsec;
+  gint64 end_nsec;
+} SysprofTimeSpan;
+
+SYSPROF_AVAILABLE_IN_ALL
+GType            sysprof_time_span_get_type (void) G_GNUC_CONST;
+SYSPROF_AVAILABLE_IN_ALL
+SysprofTimeSpan *sysprof_time_span_copy     (const SysprofTimeSpan *self);
+SYSPROF_AVAILABLE_IN_ALL
+void             sysprof_time_span_free     (SysprofTimeSpan       *self);
+
+G_END_DECLS