Move presentations and tutorials from community readme to website

[bsolino]

Currently, the "presentations" website is out of date, instead being maintained on the Community GitHub README. During the last User Engagement Team meeting it was discussed the possibility to move the "presentations" and "tutorials" tables from the Community GitHub README to the website, so they are up to date and maintained in only one place.

[bsolino]

@rswamina I believe you will also be looking into this, is that right? If not, do you know who was? I could not see the meeting, so I only have the voice to identify them.

[rswamina]

@bsolino - I will create the private repository for storing the ppt slides to be shared for presentations. Am not dealing with the migration. Hope that's ok.

[TomasTorsvik]

@bsolino - I agree that the "presentations" website is out of date, but I'm not sure it would be a good idea to move the presentations and tutorials from the community gitHub site to the webpage. I think we should guide visitors to the website to the most relevant and up-to-date information about ESMValTool, for which we already have links to Documentation and Tutorial. I would prefer to remove the presentations website, and instead refer to the community gitHub page at some place in the website, perhaps as an additional item in the Tutorial website?

[bsolino]

@TomasTorsvik I think the idea is to have a unique place where to maintain it, whether it is the community GitHub or the website.
During the last User Engagement Team meeting we considered different options, like automatically including the information available on the Community GitHub; but the consensus seemed to be that it was preferable to maintain the list on the website. Unfortunately, [the minutes](https://github.com/ESMValGroup/Community/blob/main/User Engagement Lead/Minutes/20230627.md) don't reflect that at the moment, so I can't confirm if that was indeed our conclusion. I'm double checking with the rest of the UET

[SarahAlidoost]

@bsolino @TomasTorsvik The conclusion was to move the tables from README.md in Community repo to presentations.md in ESMValTool-website repo. Some records in the tables refer to the files directory in Community repo. The links should be updated if they are relative. Also, tables in the README.md in Community repo should be replaced with a link to presentations.md in ESMValTool-website repo.

Alternatively, I think it is possible to use some jekyll plugins like remote_include or remote_file_content to re-use the content of README.md in presentations.md, see https://jekyllrb.com/docs/history/#site-enhancements-v2-5-2 and https://jekyllrb.com/docs/history/#site-enhancements-v3-0-0