Add pose filtering to pose estimation examples

[witherrrr]

Description

Adds filtering of pose estimates to the example code for performing pose estimation with PhotonVision. This addresses a common pain point with incorrect PV poses causing issues downstream in the pose estimator by providing some example code to filter out common bad poses.

Meta

Merge checklist:

• Pull Request title is short, imperative summary of proposed changes
• The description documents the what and why, including events that led to this PR
• If this PR changes behavior or adds a feature, user documentation is updated
• If this PR touches photon-serde, all messages have been regenerated and hashes have not changed unexpectedly
• If this PR touches configuration, this is backwards compatible with all settings going back to the previous seasons's last release (seasons end after champs ends)
• If this PR touches pipeline settings or anything related to data exchange, the frontend typing is updated
• If this PR addresses a bug, a regression test for it is added
• If this PR adds a dependency, the license has been checked for compatibility and steps taken to follow it

[samfreund]

Broadly LGTM, waiting until examples are less borked so it can actually build and stuff