Runtime: Polkadot Fellowship promotion/demotion periods, members activity and salaries

[muharem]

Additional logic for the Polkadot Technical Fellowship:

• promotion period - the minimum period for a member before they can be promoted to the next rank;
• demotion periods - the period following which a member may be a subject to demotion if no evidence supporting the re-approval of their rank is presented;
• members activity/passivity;
• members salaries.

Every existing ranked member needs to be manually imported into the core fellowship pallet for the new logic to be applied. New members who are inducted through the core fellowship pallet have the new logic from the start.

For more information on the continuation rules, members' activity/passivity, and the promotion period, refer to the Polkadot Fellowship Manifesto (4.3 Continuation, 4.6 Notes).

The additional settings are set and serviced via fellowship core pallet, for more information refer to the pallet's documentation. Periodical payouts managed via salary pallet.

fixes #2577

TODO

• discuss and agree on the following parameters - RegistrationPeriod, PayoutPeriod, Budget.
• Determine the SovereignAccountId for (Parent, Parachain(1001), PalletInstance(64)) on Statemint

Later

• Fund 13w7NdvSR1Af8xsQTArDtZmVvjE8XhWNdL4yed3iFHrUNCnS with USDT.

[ggwpez]

Nice.
IIUC the salary at al can be set after deployment by an extrinsic.

[muharem]

requires this change for PayOverXcm type paritytech/polkadot#7327

[muharem]

working on a test for PayOverXcm setup, the test based on xcm-emulator

[gavofyork]

@bkchr @joepetrowski going to need a cumulus locks review here...

[gavofyork]

@muharem @joepetrowski @bkontur final review/approval?

[muharem]

@gavofyork I cannot approve since I am a creator of the PR. But all the changes look good to me.

[ggwpez]

@joepetrowski is offline on vacation afaik.

[bkchr]

Did not go into every detail, but the overall configuration looks good to me. 👍