[SwapCheck] add global swap check component, this will all any function to check if a temp swap show be created.

only basic atm, but in future there will be option to set the size of swapfile, and how much free RAM is required.

for an example how to use see this commit https://github.com/oe-alliance/XMTV-Import/commit/6f19a8a75d2287696096e2bcc8c9f064ba2c7de6