Add ability to bookmark game events in Thunderscope replay logs

[itsarune]

Description of the task

Thunderscope automatically logs all messages to /tmp/tbots/. We can replay these logs using ./tbots.py run thunderscope_main --blue_log /tmp/tbots/blue/{protolog folder}.

When we actually play a game at Robocup, a 10 minute game can balloon up to 60+ minutes because of stoppages in play and it makes it really hard to review these logs.

Add the ability to "bookmark" events and add a way to jump to these bookmarks in the Thunderscope replay window.

Possible approach:

1. Add a button to the field widget toolbar to add game "bookmarks"
2. Pressing this button should send a new type of proto ReplayBookmark proto that contains the timestamp
3. ProtoPlayer should be preprocess the replay and find the ReplayBookmark protos
4. Add a button to the [ReplayControls widget](https://github.com/UBC-Thunderbots/Software/blob/master/src/software/thunderscope/replay/replay_controls.py) to jump to the next ReplayBookmark timestamp

Acceptance criteria

• Manual testing: We should be able to run Thunderscope with AI vs AI and place various bookmarks. Then, re-run the replay for the AI vs AI and jump to the various bookmarks

Blocked By