FEAT: OpenHeFS File Manager Support.

[amlel-el-mahrouss]

Abstract:

The OpenHeFS FileSystemParser needs to be exposed to its FIleMgr in order to authorize File I/O.
This issue shall be quick to solve.

References:

• NeKernel (https://github.com/nekernel-org/nekernel)
• OpenHeFS (https://github.com/nekernel-org/nekernel)