Updates new sessions to have a consistent local file system API

[cgranleese-r7]

This PR takes existing local file system functions from lib/rex/post/meterpreter/ui/console/command_dispatcher/stdapi/fs.rb and create a new mixin in order to make these reusable so that we can include them in our new SMB, and all the SQL session types.

Local fs commands:

          'getlwd' => 'Print local working directory (alias for lpwd)',
          'lcat' => 'Read the contents of a local file to the screen',
          'lcd' => 'Change local working directory',
          'lmkdir' => 'Create new directory on local machine',
          'lpwd' => 'Print local working directory',
          'lls' => 'List local files',
          'ldir' => 'List local files (alias for lls)'

Verification

• Start msfconsole
• Ensure you have the features set for the new session types - features set <session type> true
• Get a session for Meterpreter, MySQL, MSSQL, PostgreSQL and SMB - mysql_login, mssql_login, postgres_login and smb_login
• Verify Meterpreter works the same as on master
• Verify the new session type work with the new local file system commands
• Verify code changes are sane

[adfoster-r7]

Suggested change

	module LocalFs
	module LocalFileSystem

Not a blocker, as I know it's consistent with meterpreter's fs

[adfoster-r7]

not a blocker; we're missing help commands for some of these

postgresql @ 127.0.0.1:9000 (template1) > help lcat
[-] No help for lcat, try -h

[adfoster-r7]

Release Notes

Update sessions to have a consistent set of local file system commands