* feat(polygon): polygon mainnet and testnet support

WIP! DO NOT USE

* fix unit test

* fix explorer links

* compute usdc prices

* - fix the header currency label
- fix unit tests

* polygon gradient colors

* chore: adding weth to common bases (#3025)

* adding weth to common bases

* adding usdc and dai

* adding usdt and wbtc

* fix a bunch of polish issues
- 3085 detection
- some wrapping stuff
- the network selector dropdown

* fix wrap/unwrap notification text on polygon

* background color per the figma

* subgraph url

* fix the re-render blinking on the network selector

* failed network switch

* clean up duplicate code in the network switching functions

* fix text color in the privacy notice on light mode

* add some routing constants for polygon

* do not show the separator in the trade route if auto router is not supported

* - network switching without a wallet connected
- remove v2 stuff from pool page when n/a
- remove WMATIC from common bases on polygon

* background colors of network alert

* oops fix background on network alert

* clean up optimism labels

* fix alignment of text on downtime warning

* finish the network alert styles
Co-authored-by: Sara Reynolds <30504811+snreynolds@users.noreply.github.com>