feat: implement Flagsmith feature flags

[ibex088]

What does this PR do?

Fixes #12598

used flagsmith which is an open-source Feature Flag Service that we can self-host as well, (currently using their hosted service)

https://www.loom.com/share/d91d727549f74f2984a3327e00265878

Take a look and let me know if it aligns with the requirements, and i'll be happy to work on it further.

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[PeerRich]

@zomars do we wanna use this instead of our own?

[ibex088]

understood, will start working on it further then!!!

[zomars]

@zomars do we wanna use this instead of our own?

As @keithwillcode mentioned. We don't want to rely on third parties for this. It would be nice to opt-in if a hoster wants it. But it's not quite there in the current state.

[ibex088]

@keithwillcode @PeerRich @zomars can you take a look to quickly setup and test:

• set FLAGSMITH_ENVIRONMENT_ID=QLCiG9qqCJRfN34e6BAwjW in .env
• go to http://13.233.201.155:8000/
• login with [email protected] and PasswordPassword@111
• and test on maybe insights page
• kinda have to login to set traits (email and orgID)

if the FLAGSMITH_ENVIRONMENT_ID is not set it fetches flags from our Features table, otherwise it will fetch flags form flagsmith and save them in our existing FeatureProvider

[github-actions[bot]]

Hey there, there is a merge conflict, can you take a look?

[ibex088]

closing in favour of #13420