fix(statics): correct decimals for AGS, AUS, and GRTX tokens

- Fix eth:ags (Silver Standard) decimals from 18 to 4
- Fix eth:aus (Gold Standard) decimals from 18 to 4
- Fix eth:grtx (GreatX) decimals from 18 to 6
- Update corresponding OFC token decimals to match

Decimals verified by querying contract decimals() function directly.

CLOSES TICKET: WIN-8782

Author: manojkumar138

modules/statics/src/coins/erc20Coins.ts

@@ -14255,15 +14255,15 @@ export const erc20Coins = [
     '39a47119-f542-42ed-a349-1f3ebe23b0f6',
     'eth:ags',
     'Silver Standard',
-    18,
+    4,
     '0x843c9af34f698618f90c898e3967278a260c8d9a', // https://etherscan.io/address/0x843c9af34f698618f90c898e3967278a260c8d9a
     UnderlyingAsset['eth:ags']
   ),
   erc20(
     '7cbb994b-d26f-445f-aed8-7d7e179b94ee',
     'eth:aus',
     'Gold Standard',
-    18,
+    4,
     '0x171f9cfc136f2b2aaa148fcc6b660a2029bab048', // https://etherscan.io/address/0x171f9cfc136f2b2aaa148fcc6b660a2029bab048
     UnderlyingAsset['eth:aus']
   ),
@@ -14288,7 +14288,7 @@ export const erc20Coins = [
     '22c3d5be-c127-4815-97c4-2315aaeefe05',
     'eth:grtx',
     'GreatX',
-    18,
+    6,
     '0x4bbe27b87c20f76349e47cbc3908477f7bbd71b0', // https://etherscan.io/token/0x4bbE27b87c20f76349E47cBc3908477f7bBD71B0
     UnderlyingAsset['eth:grtx']
   ),

modules/statics/src/coins/ofcErc20Coins.ts

@@ -3398,14 +3398,14 @@ export const ofcErc20Coins = [
     'fd4cfe16-5228-4d92-9d87-5b8eaa1f89eb',
     'ofceth:ags',
     'Silver Standard',
-    18,
+    4,
     underlyingAssetForSymbol('eth:ags')
   ),
   ofcerc20(
     '54eff6b7-6db0-4ad3-9757-e232efc78d89',
     'ofceth:aus',
     'Gold Standard',
-    18,
+    4,
     underlyingAssetForSymbol('eth:aus')
   ),
   ofcerc20(
@@ -3428,7 +3428,7 @@ export const ofcErc20Coins = [
     'dd95c7b9-2be8-4471-920d-40e1fd583bf3',
     'ofceth:grtx',
     'GreatX',
-    18,
+    6,
     underlyingAssetForSymbol('eth:grtx')
   ),
   ofcerc20(