Feat: Add Conwai Mainnet Chain (#928)

## Add new chain

> Template to provide information about the new chain. Only add extra
information in the bottom section. Ensure that the contracts are
deployed on the chain, if not deploy with
[safe-contracts](https://github.com/safe-global/safe-contracts). Only
**one** chain ID, **one** Safe version and **one** deployment type per
PR. The RPC will be taken from
[ethereum-lists/chains](https://github.com/ethereum-lists/chains). This
entire paragraph should be deleted.

Please fill the following form:

Provide the Chain ID (Only 1 chain id per PR).
- Chain_ID: 668668

Provide RPC URL for the chain (should be able to query atleast 10
requests per minute for automatic PR check).

RPC_URL:  https://conwai.calderachain.xyz/http
Relevant information:
Add any other relevant information like blockexplorer, any annotation...

block-explorer: https://conwai.calderaexplorer.xyz/

src/assets/v1.3.0/compatibility_fallback_handler.json

@@ -285,6 +285,7 @@
     "622277": "canonical",
     "656476": ["eip155", "canonical"],
     "660279": "canonical",
+    "668668": "canonical",
     "713715": ["eip155", "canonical"],
     "763373": "eip155",
     "764984": "canonical",

src/assets/v1.3.0/create_call.json

@@ -285,6 +285,7 @@
     "622277": "canonical",
     "656476": ["eip155", "canonical"],
     "660279": "canonical",
+    "668668": "canonical",
     "713715": ["eip155", "canonical"],
     "763373": "eip155",
     "764984": "canonical",

src/assets/v1.3.0/gnosis_safe.json

@@ -285,6 +285,7 @@
     "622277": "canonical",
     "656476": ["eip155", "canonical"],
     "660279": "canonical",
+    "668668": "canonical",
     "713715": ["eip155", "canonical"],
     "763373": "eip155",
     "764984": "canonical",

src/assets/v1.3.0/gnosis_safe_l2.json

@@ -285,6 +285,7 @@
     "622277": "canonical",
     "656476": ["eip155", "canonical"],
     "660279": "canonical",
+    "668668": "canonical",
     "713715": ["eip155", "canonical"],
     "763373": "eip155",
     "764984": "canonical",

src/assets/v1.3.0/multi_send.json

@@ -285,6 +285,7 @@
     "622277": "canonical",
     "656476": ["eip155", "canonical"],
     "660279": "canonical",
+    "668668": "canonical",
     "713715": ["eip155", "canonical"],
     "763373": "eip155",
     "764984": "canonical",

src/assets/v1.3.0/multi_send_call_only.json

@@ -285,6 +285,7 @@
     "622277": "canonical",
     "656476": ["eip155", "canonical"],
     "660279": "canonical",
+    "668668": "canonical",
     "713715": ["eip155", "canonical"],
     "763373": "eip155",
     "764984": "canonical",

src/assets/v1.3.0/proxy_factory.json

@@ -285,6 +285,7 @@
     "622277": "canonical",
     "656476": ["eip155", "canonical"],
     "660279": "canonical",
+    "668668": "canonical",
     "713715": ["eip155", "canonical"],
     "763373": "eip155",
     "764984": "canonical",

src/assets/v1.3.0/sign_message_lib.json

@@ -285,6 +285,7 @@
     "622277": "canonical",
     "656476": ["eip155", "canonical"],
     "660279": "canonical",
+    "668668": "canonical",
     "713715": ["eip155", "canonical"],
     "763373": "eip155",
     "764984": "canonical",

src/assets/v1.3.0/simulate_tx_accessor.json

@@ -285,6 +285,7 @@
     "622277": "canonical",
     "656476": ["eip155", "canonical"],
     "660279": "canonical",
+    "668668": "canonical",
     "713715": ["eip155", "canonical"],
     "763373": "eip155",
     "764984": "canonical",