implementation of TRestDataSet

[vicctorps]

This PR is related to issue #13.

A class allowing to create datasets from an official REST data repository.

RML setup would look as follows:

    <TRestDataSet name="BabyIAXO_Test_DataSet_00">
        <parameter name="startTime" value="2022/04/28 00:00" />
        <parameter name="endTime" value="2022/11/25 13:20" />
        <parameter name="filePattern" value="/home/jgalan/rest-framework/source/libraries/axion/examples/full-ray-tracing/BabyIAXO_TrueWolterMicromegasTest*.root"/>

        <filter metadata="TRestRun::fRunNumber" greaterThan="370" lowerThan="375" />
        <filter metadata="TRestRun::fRunTag" contains="Test" />

        <observables list="window_transmission:optics_efficiency:axionPhoton_probability:axionPhoton_transmission:boreExitGate_transmission" />

        <processObservables list="final" />
    </TRestDataSet>

The class will be capable to generate a final txt file with the selected data, and a header with the origin of the data:

### TRestDataSet generated file
###
### StartTime : 2022/04/28 00:00
### EndTime : 2022/11/25 13:20
###
### Data path : /home/jgalan/rest-framework/source/libraries/axion/examples/full-ray-tracing
### File pattern : BabyIAXO_TrueWolterMicromegasTest*.root
###
### Metadata filters :
### - TRestRun::fRunNumber. Greater than: 370.000. Lower than: 375.000.
### - TRestRun::fRunTag. Contains: Test.
###
### Observables list:  runOrigin eventID timeStamp window_transmission optics_efficiency axionPhoton_probability axionPhoton_transmission boreExitGate_transmission final_energy final_posX final_posY final_posZ final_R final_thetaAngle final_phiAngle
###
### Data starts here
000373  000003  0000000000  9.945e-01   2.828e-01   4.034e-19   1.000e+00   1.000e+00   7.021e+00   5.524e+00   -5.612e-01  1.454e+04   5.553e+00   4.188e-02   1.313e+00
000373  000004  0000000000  0.000e+00   6.521e-01   7.624e-19   1.000e+00   1.000e+00   2.744e+00   2.122e+00   -1.710e+00  1.454e+04   2.726e+00   2.012e-02   2.235e+00