[PWGCF] Add multiplicity and transverse momentum fluctuations analysis task

[orubza]

This pull request is for multiplicity and transverse momentum fluctuations analysis task.

The code is tested locally using O2Physics.

[github-actions]

O2 linter results: ❌ 1 errors, ⚠️ 4 warnings, 🔕 0 disabled

[vkucera]

Hi @orubza , please read the contribution guidelines to get familiar with the development cycle and the steps expected from you. Since you are adding a new file, make sure it is clean from errors and warnings.

[orubza]

Hi @orubza , please read the contribution guidelines to get familiar with the development cycle and the steps expected from you. Since you are adding a new file, make sure it is clean from errors and warnings.

Hi @vkucera I am commiting my code first time. I also checked my errors and I see it is only showing in the CMakeList.txt. Could you please look into it?

[vkucera]

Hi @orubza , please read the contribution guidelines to get familiar with the development cycle and the steps expected from you. Since you are adding a new file, make sure it is clean from errors and warnings.

Hi @vkucera I am commiting my code first time. I also checked my errors and I see it is only showing in the CMakeList.txt. Could you please look into it?

You still have warnings.