Feature: Add support for parsing & timestamp extraction for PushIDs

[t3hmrman]

Context

Upstream implementation of pushid is not quite enough -- it's lacking in two major areas:

• Parsing strings into internal representation PushIDs
• Extracting timestamps from generated PushIDs

Proposal

Upstream changes should be made, then vendored, and eventually accepted upstream in order to add the functionality to pushid.

Alternatives

N/A

Additional Links

There is already one PR for adding functionality upstream:

silverbeak/rust-push-id#1

There is also a branch underway:

https://github.com/VADOSWARE/pg_idkit/tree/feat/pushid/add-timestamp-extraction-and-parsing

[t3hmrman]

Closing since the issue is stale and no progress on the PR has been made in 2 years (!)