refactor(StakeManager): refactor multiplier points logic

[3esmit]

Description

Replaces #52

• Renames fields to more descritive variable names:

  • Account.multiplier -> Account.currentMP
  • multiplierSupply -> totalSupplyMP
  • stakeSupply -> totalSupplyBalance

• New field:

  • Account.initialMP: used for saving how much of currentMP was generated for bonusMP (can be renamed to bonusMP), retrieved when checking if MAX_BOOST is reached.

• processEpoch is now called at first of every external function that would need it, as a modifier.

• Fix in migration of processAccount, send only the difference of generated MP to new contract.

• Now with code reuse for math formulas

• Mint Intial (Bonus) MPs now use the same formula as the regular multiplier points, but deltaTime is lockedTime.

• Fixed the Lock and Mint function about locked funds. Now it mints correctly for increased time locked, and increased balance in remaining time locked. Fixes #13

• Changed how lock function works: Now lock time can only increase (previously it reverted), now the parameter value represents time increased, and therefore this case does not exist anymore.

• Accounts are properly initialized at first stake (Fixes #49)

Checklist

Ensure you completed all of the steps below before submitting your pull request:

• [x] Added natspec comments?
• [ ] Ran forge snapshot?
• [x] Ran pnpm lint?
• [x] Ran forge test?
• [ ] Ran pnpm verify?

[3esmit]

This looks very nice to me!

Can we create issues for the items you've added in the "todo" commit?

Yes, I didnt fixed them here because the fix is not that simple. I mean, I could just multiply by 100 and divide it back, however there are other ways of fixing them, and I want to have a deeper insight on that solutions,