BAI-1570 add new get-used-storage script

[PE39806]

Example output:

$ npm run script -- getTotalStorageUsedMongo

> [email protected] script
> npm --prefix ./backend/ run script getTotalStorageUsedMongo


> script
> tsx src/scripts/runScript.ts getTotalStorageUsedMongo

info  - (src/utils/database.ts:1): Connected to Mongoose
info  - (src/scripts/getTotalStorageUsedMongo.ts:1): Storage used: (existing=11872605593 deleted=1247864 total=11873853457)
info  - (src/scripts/getTotalStorageUsedMongo.ts:1): Formatted storage used: (existing=11.9 GB deleted=1.25 MB total=11.9 GB)
info  - (src/utils/database.ts:1): Disconnected from Mongoose (log=false)