[heft] feat: add new task-level timing metrics

[aramissennyeydd]

Summary

Adds task-level metrics for reporting on how long specific plugins take to execute, like the Typescript, Jest, and Webpack plugins. These are currently only logged out to console in verbose mode.

Details

I copied most of the existing implementation of the recordMetrics hook to create a recordTaskMetrics hook - the idea here is being able to report on the specific amount of time that each task takes and add more granular reporting. Let me know what you think about the metric envelope.

How it was tested

Added a test heft-lifecycle-plugin that logs out the time taken for each task (you can still see the verbose logs too). Example:

[build:api-extractor] Finished task execution (651.9908750000002ms)
[lifecycle:example-lifecycle-plugin] Finished build:api-extractor in 651.99ms
[build:metadata-test] Finished task execution (652.479875ms)
[lifecycle:example-lifecycle-plugin] Finished build:metadata-test in 652.48ms

Impacted documentation

Not sure?