docs(eas): update EAS build & submit instructions

[asdolo]

What does this do?

• Update EAS.md instructions file to latest changes from the EAS build and submit processes.
• Add new NPM scripts for creating iOS credentials for each environment (pnpm credentials:development:ios, pnpm credentials:qa:ios, pnpm credentials:staging:ios and pnpm credentials:production:ios).
• Add new NPM scripts for submitting a build for each environment (pnpm submit:development:mobile, pnpm submit:qa:mobile, pnpm submit:staging:mobile and pnpm submit:production:mobile).

Why did you do this?

There was a minor issue in the original EAS instructions regarding the eas credentials command. Running that command only creates credentials for the development environment. With the updated instructions, we now have proper documentation on how to create credentials for all environments.

I also used this change as an opportunity to restructure the rest of the file for better organization.

Who/what does this impact?

Developers who want to use EAS to build and distribute their apps.

How did you test this?

N/A

[github-actions]

💯 Test Coverage

Lines	Statements	Branches	Functions
	50.79% (257/506)	46.15% (102/221)	36.12% (69/191)

😎 Tests Results

Tests	Skipped	Failures	Errors	Time
68	0 💤	0 ❌	0 🔥	27.106s ⏱️

👀 Tests Details • (51%)

File	% Stmts	% Branch	% Funcs	% Lines	Uncovered Line #s
All files	50.79	46.15	36.12	51.76

report-only-changed-files is enabled. No files were changed in this commit :)