* feat: added worker for executing and scheduling parallel tasks
* feat: implemented worker based execution over cron handlers
* feat: added router to package to run go fiber for dns validation
* chore: added router package to go workspace
* feat: added dns route controller
* feat: added dns validation handler for route
* feat: added healthcheck as a core function
* feat: implemented worker for scheduling and running multiple tasks over goroutines
* feat: added cron and http start handlers
* feat: added prime scheduler handler to comply with prime scheduler
* feat: implemented worker in cli start command
* feat: added tests for dns validation handler
* feat: added run test script to run test inside monitor
* feat: added test for background worker
* feat: implemented graceful shutdown for cancellation of jobs
* feat: added readme for core package
* fix: worker cancellation of tasks with ctx
* fix: added closing channels in worker
* fix: handled case for repeated keys in dns validation endpoint
