feat: Added PoolTogether V5 TVL

[Ncookiez]

This PR adds TVL data for PoolTogether V5.

The implementation is in projects/pooltogether/v5.js.

I have split up the code for V3, V4 and V5 into separate files. index.js calls each of these files and adds the TVLs together.

The V3 and V4 code has been linted and cleaned up a bit, but otherwise no real changes were made to those.

Other Notes

• I've removed a seemingly random pooltogether reference in the .gitignore. This was added a really long time ago for apparently no reason. Unsure why that was there.
• I've added a couple more "hallmark" timestamps; the launch of V4 and the launch of V5.

[llamatester]

The adapter at projects/pooltogether exports TVL:

avax                      72.00 k
celo                      55.38 k
polygon                   2.34 M
optimism                  2.72 M
bsc                       3.14 k
ethereum                  3.68 M

total                    8.88 M 

[llamatester]

The adapter at projects/pooltogether exports TVL:

avax                      72.28 k
optimism                  2.69 M
celo                      55.07 k
polygon                   2.42 M
bsc                       3.11 k
ethereum                  3.85 M

total                    9.08 M 

[g1nt0ki]

@Ncookiez thanks for the changes, I have updated it a bit to use sdk-v4.x

would you prefer if we show tvl per version like we show for aave/uniswap or as it is now?

[Ncookiez]

Thanks for the update! First time contributing to this repo, so wasn't sure exactly what patterns to use.

would you prefer if we show tvl per version like we show for aave/uniswap or as it is now?

I think it'd make sense to split it between versions! Is this something you can easily handle on your end or do you need me to set things up differently?