Add create accounts (new IA)

[nhussein11]

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[Copilot]

Pull request overview

This PR adds comprehensive documentation and code examples for creating Polkadot accounts programmatically using TypeScript/JavaScript, Python, and Rust. The tutorial provides developers with practical examples to generate accounts with mnemonics and addresses across different language ecosystems.

• Complete tutorial documentation with setup instructions, code examples, and explanations for three programming languages
• Executable code snippets demonstrating account creation with mnemonic generation
• Terminal output examples showing expected results for each language implementation

Reviewed changes

Copilot reviewed 7 out of 7 changed files in this pull request and generated 8 comments.

Show a summary per file

File	Description
.snippets/code/chain-interactions/accounts/create-account/create_account.py	Python code snippet for account creation using substrate-interface library
.snippets/code/chain-interactions/accounts/create-account/create-account.ts	TypeScript code snippet for account creation using Polkadot.js libraries
.snippets/code/chain-interactions/accounts/create-account/create-account.rs	Rust code snippet for account creation using sp-core primitives
.snippets/code/chain-interactions/accounts/create-account/create-account-ts.html	Terminal output example for TypeScript implementation
.snippets/code/chain-interactions/accounts/create-account/create-account-rs.html	Terminal output example for Rust implementation
.snippets/code/chain-interactions/accounts/create-account/create-account-py.html	Terminal output example for Python implementation
.chain-interactions/accounts/create-account.md	Main tutorial documentation with setup instructions, explanations, and integration of all code examples

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