wbot v0.2.2

feat(crawler): fixing crawl functionality (#5)

## Motive

this MR to fix issue with the crawling functionallity of the bot. the issue was with default fetcher that was using the `http.Client` that and it will block if the request takes too long to respond. the fix was to use `http.Client` with a timeout and a custom transport that will limit the number of concurrent requests.

## Changes

- removed `OnError` Method.
- added zerolog logger.
- refactor metrics monitoring and add new metrics
- reverted to simple queue.
- timeout to HTTP client.
- update gitignore.

WBot v0.1.6

wbot v0.1.5

wbot v0.1.4