Introduces `useFeatureUsageTracker` composable that tracks how many
times a user has used a specific feature, along with first and last
usage timestamps. Data persists to localStorage using `@vueuse/core`'s
`useStorage`. This composable provides the foundation for triggering
surveys after a configurable number of feature uses. Includes
comprehensive unit tests.
┆Issue is synchronized with this [Notion
page](https://www.notion.so/PR-8175-feat-add-feature-usage-tracker-for-nightly-surveys-2ee6d73d36508118859ece6fcf17561d)
by [Unito](https://www.unito.io)
