Adding conan package manager (Opt-in)

[YanzhaoW]

Purpose

Adding conan package manager to R3BRoot such that users can freely utilize popular C++ packages without waiting for updates from FairSoft.

By default, conan package manager is not enabled. To enable it, users have to configure cmake with cmake presets (in project root folder):

git submodule update --init --recursive
cmake --preset default

This PR is one part of the PR #890. Other parts will be presented in the following PRs.

Any reviews and comments are welcome.

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Checklist:

• [x] Rebased against dev branch
• [x] My name is in the resp. CONTRIBUTORS/AUTHORS file
• [x] Followed the pull request guidlines and the Git workflow
• [x] Followed the seven rules of great commit messages

[YanzhaoW]

Hi @jose-luis-rs . It's ready to be merged.

[jose-luis-rs]

Hi @YanzhaoW

Let me know if you want to change/update something wrt this message:

==> WARNING: A newer version of conda exists. <== current version: 23.5.2 latest version: 24.7.1

Please update conda by running

$ conda update -n base -c defaults conda

Or to minimize the number of packages updated during conda update use

 conda install conda=24.7.1

[YanzhaoW]

@jose-luis-rs

Thanks for the info. I will update the conda version directly from the container. So there is no need to do any change in this PR regarding this.