[Feature] Support CfgFunctions natively

[DarkWanderer]

Is your feature request related to a problem? Please describe.
I would like to run tests in a project which has CBA-like structure - multiple subdirectories and cross-addin function calls. To do that, I need to be able to load functions from multiple projects simultaneously - using CfgFunctions which is already defined in each project

See also: #186 #196

Describe the solution you'd like
Have a flag which allows sqfvm to parse CfgFunctions config section and load referenced SQF files from virtual filesystem, using PBO or explicit mapping via cmd arg
e.g. sqfvm --input-pbo my.pbo --parse-cfgfunctions

Describe alternatives you've considered
I have considered loading files manually - however, it is tedious and may lead to inconsistencies

[X39]

Implemented in 73d30d4

To load CfgFunctions functions in SQF-VM, add --use-cfg-functions to the command line

Please reopen if not as desired in latest development release

[DarkWanderer]

Version built from development branch does not seem to read CfgFunctions correctly

sqfvm.exe --use-cfg-functions --suppress-welcome --input-pbo dynops_civilians.pbo
1:      [] call dynops_civilians_fnc_onCivilianKilled
2:

Executing...
------------------------------------------------------------------------------------------------------------------------------------------
[WRN] [L1|C8|__commandlinefeed.sqf]     A variable with the name 'dynops_civilians_fnc_onCivilianKilled' could not be found.
[WRN] [L1|C3|__commandlinefeed.sqf]     Nil value provided for right-handed argument.
[WRN] [L1|C35|__service]        No config entry with the name 'CfgFunctions' could be located at path config/bin.
[ERR] [L5|C20|__service]        Provided value is null.

[FAT] [L5|C20|__service]        Stacktrace:<  1 of 1> [L5|C20|__service]        [missionNamespace] [SCOPENAME-EMPTY]

dynops_civilians.zip

[X39]

Possibly related to pbo input