fix: update run with dynamic fee params

[dutterbutter]

What 💻

• Updated default gas price constants for L1, L2, and fair pubdata price in src/config/mod.rs.
• Added support for offline mode in the CLI, disabling network requests and using default fee parameters. Included an improved warning message to guide users in overriding values via config.toml and --config flag in src/config/cli.rs and src/main.rs.
• Updated test assertions in e2e-tests/test/zks-apis.test.ts, src/node/eth.rs, and src/node/zks.rs to reflect new gas limit and fee values.

Why ✋

• Improved gas estimation accuracy, aligning with network requirements and fee model expectations.
• Enabled offline mode to support scenarios where network access is unavailable or restricted, ensuring graceful fallback to default values.
• Enhanced test cases to align with new gas limit configurations and ensure accuracy in fee model assertions.

Evidence 📷

Include screenshots, screen recordings, or console output here demonstrating that your changes work as intended

Closes #347

[dutterbutter]

I dont think this is the best approach and likely still need improvements re: #365 but for the short-term provides users with accurate gas estimations during default run operation.

[MexicanAce]

LGTM