[FeatureRequest]: Configurable timeout for M303 tuning

[droftarts]

Is your feature request related to a problem? Please describe.

M303 autotuning has a 30 minute time limit for bed/chamber to reach temperature, and a 7 minute time limit for hot end heaters to reach temperature. As machines get larger, this may not be long enough.

Describe the solution you propose.

Add a parameter to M303 to override the default timeout.

Describe alternatives you've considered

• Set a lower target temperature, that can be achieved within 30 minutes.
• Start auto-tuning at a higher temperature, such that the target temperature can be reached within 30 minutes, and use M303 with an A parameter.
• Modify firmware to increase timeout.

Provide any additional context or information.

Ex. Photos, mockups, etc.