feat: FlashMintDex (#181)

* swap data instead of component quotes

* stack still too deep

* refactor issuance functions

* refactor redeem functions

* clean up issue and redeem with eth

* WIP FlashMintDex integration tests

* add test file

* refactor tests wip

* flashmint dex issuance test for 1 component

* univ3 tests pass

* test sushiswap

* wip usdc support

* need to change buycomponents function to use weth only

* return excess input token

* issue from erc20

* internal issue exact set from weth function

* failing redeem for eth test

* redeem for eth test passes

* redeem to usdc test

* issue and redeem from weth

* 1 deploymnent 2 controllers

* update tests for combined params

* cleanup

* finish separating payment info struct

* refactor tests for separate payment struct

* cleanup console logs

* issue legacy set token with eth

* erc20 tests for legacy set token

* tests for redeem legacy set tokens

* add getIssueExactSet functions return input token amounts

* tests for getting eth required

* refactor legacy token tests

* getRedeemExactSetForEth

* use getRedeemExactSet for legacy token test

* test clean up

* getRedeemExactSetForToken wip

* fixes to redeem set token tests

* fix redemption when weth is component

* combine getissueexactset functions

* refactor getIssueExactSet

* refactor getRedeemExactSet

* reorder funcs

add comments

* cleanup

* invalid swap and settoken

* test for revert on invalid issuance

* test for eth received in redemption

* test for min received usdc for redemption

* tests for invalid issuance module and set token

test for revert on eth direct deposit

* test for returning excess input token

* cleanup

* better assignment ordering

* cleanup for pr

* cleanup for pr

* no need to calc exact component prices when issuing/redeeming

* reuse deployed dexadapterv2 library; add natspec to constructor

* refactor getter functions

* add contract-level notice and reference FlashMint SDK

* remove require for overspent eth; enforce no external positions

* Add minimum threshold for returning unused funds when issuing

* add note about not requiring off-chain quotes

* update struct comment

Author: edkim