feat(process): improved cpu usage calculation

feat(process): default sort by memory usage

feat(memory): add bufio

feat(cpu): add error handling

add gitignore

feat(collector): parallelize system stat collection using goroutines

feat(collector): improve CPU usage accuracy using cached time-delta strategy

feat(cache): add hasprevioususage method

feat(cpu): implement cpu temperature caching mechanism

changed temperature cache to 6 seconds

refactor(cache): temperature data type changed to float32

fix(cpu): fix inverted logic in IsModelCacheValid when checking model presence

feat(collector): add cpucache in systemstats

feat(cpu): add cache for cpu data

refactor(stats): change temperature type from float64 to float32