Add AppConstants

[sapatevaibhav]

Add the AppConstants.dart file and move all the strings used in the Dart files to that file. Define the strings in AppConstants.dart as follows:

class AppConstants {
  static const String nose = "Nose";
  static const String noseDescription = "This is nose description";
}

Then, access them from other files like this:

Text(AppConstants.noseDescription)

It is important for clean, organized, and easily maintainable codebase,

[Gaurav-Kushwaha-1225]

Hi @sapatevaibhav, I am a contributor under GSSoC'24. Can you assign this issue to me??

[VedaVarxha]

@sapatevaibhav I would like to work on this issue under GSSOC'24. Please assign it to me.

[hariram4862]

@sapatevaibhav I would like to contribute on this issue.... Can you please assign it to me? i have some experience on this... you can look on to this repo link ...

[mayankgongal5]

Hey @sapatevaibhav can you please assign this to me ? its my first time in gssoc and I am intermediate in fluter

[kamalexe]

I can address the UI issue in Alphabet section #28. Please assign it to me. I am participating in GSSoC'24.

[hiranj-kotak]

Hey @sapatevaibhav can you assign this issue to me ? I have 1 year experience in flutter

[aryanmehra0]

@sapatevaibhav hii I want to be contributer to this particular task plz assign this to me

[Gaurav-Kushwaha-1225]

Should I move the common or constant functions to the AppConstants file too?? @sapatevaibhav

[sapatevaibhav]

Should I move the common or constant functions to the AppConstants file too?? @sapatevaibhav

Just make a separate file for functions..