Improve I/O ports field-grid synchronization and field access support

[lmcapacho]

This pull request improves the interaction between the text fields and the I/O ports table by introducing update flags to prevent infinite loops caused by mutual onChange triggers.

• Add support for reading individual form field values by index.
• Encapsulated updateIOPortsTable and onEnterIOPortsTable inside FormBasicCode.
• Replaced self.table with explicit table parameter to clarify ownership.
• Added _updatingFromText and _updatingFromGrid flags to avoid recursive updates.
• Updated onChange callbacks in the constructor to respect the flags.

This ensures a more stable and maintainable synchronization logic between user inputs and the I/O ports configuration table.

[cavearr]

Thanks @lmcapacho , i'm reviewing now! thanks again!

[jojo535275]

Gracias Luis Miguel for you work on this update,
i will give it a try once the executables are ready!

[cavearr]

in few minutes will be ready! i've talked with @lmcapacho few days ago, if you do more changes out of this feature, wait some days, i'm rewritting a lot of thinks and the merge will be very complicated. at the end of july aprox i'll have the first new verion approach.

Good weekend!

[cavearr]

the building process is broken by nwjs update, i'm working on it, i'm telling you soon.

[jojo535275]

ok, thanks Carlos,
Have a nice weekend too!