[BCI-2714]: adds sncast scripts V2

[chris-de-leon-cll]

Adds various fixes to: #396:

• Adds a --max-fee flag to the testnet account deployment command
• In read_decimals.cairo, the "read_decimals" selector has been replaced with "decimals"
• Resolves an issue with the make ac-set-answer command on testnet where calling it with a non-mock aggregator contract throws a read access permission error
• Updates the hardcoded class hashes and addresses in the example scripts (the updates to snfoundry, scarb, and cairo have caused these to change)

[cl-sonarqube-production]

Quality Gate passed

Issues
0 New issues
0 Fixed issues
0 Accepted issues

Measures
0 Security Hotspots
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