RCT new front page

[mtitov]

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[mtitov]

@AymenFJA please use this branch

missing figures

• @AymenFJA please provide sources for ROSE and AsyncFlow (link them to a corresponding doc)
• @andre-merzky let's have a different figure for RP, the old one (even with changes) doesn't look good

p.s., we will archive (create a tag) old pages, and remove them from the main branch

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[mtitov]

TODO:

• Create a tag for the current main branch, keep it as an archive of the original RCT introduction page
• Preserve directory /presentations, which stores the recordings for RP demo (part of the RP documentation)
• Some fixes
  • Repo readme
  • Extend intro paragraph (keep it the same as the 1st paragraph from RCT intro - https://github.com/radical-cybertools/radical-cybertools.github.io/blob/refactor/v2/docs/main.md#radical-cybertools)
  • Remove "circle" from the background