Time Range Data ADR

Outlines a design plan for creating a Time Range Data widget.
This will display view range and selection range,
and allow the user to edit the selection range using
exact nanosecond timestamps.

Signed-off-by: Will Yang<william.yang@ericsson.com>

doc/adr/0008-TimeRangeData-widget.md

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+# 8. Time Range Data Widget
+
+Date: 2023-1-10
+
+## Status
+
+ACCEPTED
+
+
+## Context
+
+There has been a request for the ability for users to be able to select part of a trace by copy/pasting timestamp data.  An attempt was made to implement this feature, but a consensus could not be reached on the UI/UX.  Design needs to be agreed upon before any further implementation.
+
+The proposed design is subject to change based on feedback.
+
+### Proposed UX Design
+
+#### UX Flow
+
+A "Time Range Data" widget will be added to the left panel.
+
+![LEFT_PANNEL](./0008/LeftPanel.jpg)
+
+The widget will display: View Start, View End, Selection Start, Selection End.
+
+![WIREFRAME_1](./0008/TRDW_1.png)
+
+
+Clicking on the Selection Start / End input box displays a Submit and Cancel button.  Only the selection start/end will be editable.
+
+![WIREFRAME_2](./0008/TRDW_2.png)
+
+If the selected time is invalid, the user will be notified onSubmit with a red asterisk and warning message at the top.  Submit and Cancel buttons will remain visible.
+
+![WIREFRAME_3](./0008/TRDW_3.png)
+
+If the selected time is valid, the selection range will be set and the widget will return to it's initial state.
+
+#### UX Miscellaneous Behaviors
+* The view range will not change when the selection range is changed.  This includes panning and zooming.
+* The time will be displayed in absolute time as nanoseconds, since that is the format users timestamp data will be.
+
+### Architecture Design
+
+In a recent PR the "Item Properties Widget" was refactored to be more compatible with future VSCode implementations.  The design of this widget should follow the new architecture.
+
+[Created a widget for properties view in react-components #892](https://github.com/eclipse-cdt-cloud/theia-trace-extension/pull/892/files)
+
+## Decision
+
+This has been approved as outlined above.
+
+## Consequences
+
+Use of left-side panel real estate.