Lido V2: initial doc rework

[TheDZhon]

• [x] Rename contracts #212
• [x] Update sidebar #212
• [x] Remove stETH/ETH deprecated price oracle mentions #212
• [x] Remove 'withdrawals aren't available yet claims' and include withdrawals support feature here and there as a part of the protocol #212
• [x] Update contents for contracts
  • [x] LidoLocator (@folkyatina) #243
  • [x] Lido (@folkyatina) #219
  • [x] EIP712StETH (@TheDZhon) #233
  • [x] AccountingOracle (@loga4) #232
  • [x] ValidatorsExitBusOracle (@loga4) #232
  • [x] HashConsensus (@loga4) #232
  • [x] LegacyOracle (@TheDZhon) #234
  • [x] OracleReportSanityChecker (@Psirex) #225
  • [x] OracleDaemonConfig #218
  • [x] StakingRouter (@mymphe) #230
  • [x] WithdrawalQueueERC712 (@folkyatina) #221
  • [x] WithdrawalVault (@folkyatina) #221
  • [x] WstETH (@folkyatina) #242
  • [x] DepositSecurityModule (@arwer13) #229
  • [x] Burner (@arwer13) #220
  • [x] LidoExecutionLayerRewardsVault #212
  • [x] GateSeal #212
  • [x] NodeOperatorsRegistry (@arwer13) #251
• [ ] Update contents for guides
  • [ ] remove stETH superuser functions (@TheDZhon) #238
  • [ ] Protocol levers (@TheDZhon) #238
  • [ ] Roles roster (@TheDZhon) #238
• [ ] Update any other mentions
  • [ ] TBA
• [ ] Verify deployment branches and addresses (@arwer13)
• [x] Remove Terra mentions :new_moon_with_face: #212
• [x] Remove Rinkeby, Kovan, and Ropsten deployments (testnets are discontinued) #212
• [ ] final clean-up (unify parameters as lists?, ...?)

[arwer13]

One discrepancy nice to unify is "Callable only by owner" and "Reverts if msg.sender is not owner", wdyt?

[folkyatina]

One discrepancy nice to unify is "Callable only by owner" and "Reverts if msg.sender is not owner", wdyt?

TBH, not really get the context.

[arwer13]

There are places with (1): Only callable by the owner. and (2):

:::note
Reverts if any of the following is true:
* `msg.sender` is not the owner;

I would prefer to leave only the line in reverts section.

UPD: ok, there were only Burner and DSM with "only callable...". Its replaced to option (1) in Burner already, so I would prefer even more to use (2) in DSM.