feat: add balancer base chain

[zilayo]

• Add Base chain for dexs/balancer
• Add Balancer router address on Base chain in routers/routerAddresses.ts

[llamatester]

The balancer adapter exports:

---

Dexs for 21/9/2023
_______________________________________

Version -> V1
---------
ETHEREUM 👇
Backfill start time: 27/2/2020
NO METHODOLOGY SPECIFIED
Timestamp: 1695340799
Block: 18187681
Total volume: 28690775629.331905
Daily volume: 2861677.874004364


Version -> V2
---------
ETHEREUM 👇
Backfill start time: 23/4/2021
NO METHODOLOGY SPECIFIED
Daily volume: 16021366.232331706
Timestamp: 1695340799


POLYGON 👇
Backfill start time: 24/6/2021
NO METHODOLOGY SPECIFIED
Daily volume: 482461.57594389276
Timestamp: 1695340799


ARBITRUM 👇
Backfill start time: 31/8/2021
NO METHODOLOGY SPECIFIED
Daily volume: 2617789.091313431
Timestamp: 1695340799


XDAI 👇
Backfill start time: 14/1/2023
NO METHODOLOGY SPECIFIED
Daily volume: 241256.74682149588
Timestamp: 1695340799


POLYGON_ZKEVM 👇
Backfill start time: 22/5/2023
NO METHODOLOGY SPECIFIED
Daily volume: 15070.955107089016
Timestamp: 1695340799


AVAX 👇
Backfill start time: 25/2/2023
NO METHODOLOGY SPECIFIED
Daily volume: 158758.66669561173
Timestamp: 1695340799


BASE 👇
Backfill start time: 28/7/2023
NO METHODOLOGY SPECIFIED
Daily volume: 1756690.424345706
Timestamp: 1695340799


Done in 11.78s.