Improvements

[steel97]

Checklist

• App update process has been followed
• Target branch is develop
• Application version has been bumped

This PR adds CodeQL and fixes most of it's warnings

Summary:

• added overflow check for offset + tokens_count in send_response_attested_input_frame
• added CodeQL workflow
• fixed private key check in ergo_secp256k1_schnorr_p2pk_sign_init
• docs: fixed tests run documentation
• docs: added notes about max buffer size of Ergo Tree and Additional Registers
• docs: added note, which indicates that Aditions Registers must be added after Tokens

[github-advanced-security]

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