added cfg and ini for PYTHIA CR tune with CR mode=1 (#2079)

Author: BanajitBarman

MC/config/ALICE3/ini/pythia8_pp_cr_136tev.ini

@@ -0,0 +1,9 @@
+[Diamond]
+width[2]=6.0
+
+[GeneratorExternal]
+fileName=${O2DPG_MC_CONFIG_ROOT}/MC/config/ALICE3/pythia8/generator_pythia8_ALICE3.C
+funcName=generator_pythia8_ALICE3()
+
+[GeneratorPythia8]
+config=${O2DPG_MC_CONFIG_ROOT}/MC/config/ALICE3/pythia8/generator/pythia8_pp_cr_136tev.cfg

MC/config/ALICE3/pythia8/generator/pythia8_pp_cr_136tev.cfg

@@ -0,0 +1,21 @@
+### Specify beams
+Beams:idA = 2212
+Beams:idB = 2212
+Beams:eCM = 13600.              ### energy
+
+Beams:frameType = 1
+ParticleDecays:limitTau0 = on
+ParticleDecays:tau0Max = 10.      ### match alice: 1cm/c = 10.0mm/c
+
+### processes
+SoftQCD:inelastic = on # all inelastic processes
+# default:  Monash 2013
+Tune:pp = 14
+
+### CR configurations
+ColourReconnection:mode = 1 # new colour reconnection scheme
+ColourReconnection:allowJunctions = on
+
+BeamRemnants:remnantMode = 1 # work with CR mode = 1
+
+