Add Copilot instructions and .gitignore

[Copilot]

Configures GitHub Copilot coding agent instructions per best practices at https://gh.io/copilot-coding-agent-tips.

Changes

• .github/copilot-instructions.md: 240-line guide covering:

  • Project structure (Rust CLI for Solana wallet management with ratatui TUI)
  • Build/test/lint processes (cargo build, cargo test, cargo fmt/clippy)
  • Security requirements for handling Solana private keys
  • CI/CD checks (build, test, coverage, clippy -D warnings, fmt)
  • Known issues:
    • Keypair::from_bytes removed in solana-sdk 3.0.0 (affects key_validator.rs:37, tui.rs:397, wallet_manager.rs:162) - migrate to Keypair::new_from_array([u8; 32]) using first 32 bytes of keypair
    • frame.size() deprecated in ratatui - use frame.area()
  • Module status: config.rs, logging.rs, transaction_handler.rs implemented but not yet imported in main.rs

• .gitignore: Standard Rust exclusions (target/, IDE files, coverage reports)

• Cleanup: Removed 2,083 committed build artifacts from target/

Example from instructions

// Migration for Keypair::from_bytes removal in solana-sdk 3.0.0
// Old (no longer available):
Keypair::from_bytes(&key_bytes)

// New (use first 32 bytes as seed):
let seed: [u8; 32] = key_bytes[0..32].try_into()?;
Keypair::new_from_array(seed)

Original prompt

---

This section details on the original issue you should resolve

<issue_title>✨ Set up Copilot instructions</issue_title>
<issue_description>Configure instructions for this repository as documented in Best practices for Copilot coding agent in your repository.

</issue_description>

Comments on the Issue (you are @copilot in this section)

• Fixes ✨ Set up Copilot instructions #28

---

💡 You can make Copilot smarter by setting up custom instructions, customizing its development environment and configuring Model Context Protocol (MCP) servers. Learn more Copilot coding agent tips in the docs.

[devloai]

Unable to perform a code review. You have run out of credits 😔
Please upgrade your plan or buy additional credits from the subscription page.

[Copilot]

Pull request overview

This PR adds comprehensive GitHub Copilot coding agent instructions and a standardized .gitignore file to improve developer experience and project maintainability. It establishes documentation for project structure, build processes, security requirements, and coding conventions for the svmai Rust CLI tool - a Solana wallet management application with a ratatui-based TUI.

Key Changes:

• Added 253-line .github/copilot-instructions.md documenting project structure, build/test processes, security practices, CI/CD workflow, and development guidelines
• Enhanced .gitignore with comprehensive Rust-specific exclusions including build artifacts, IDE files, OS files, and test coverage reports
• Removed 2,083 committed build artifacts from the target/ directory (mentioned in description but not visible in diffs)

Reviewed changes

Copilot reviewed 1 out of 2 changed files in this pull request and generated 2 comments.

File	Description
.gitignore	Adds additional Rust build artifacts (*.rs.bk, .pdb), OS files (.DS_Store, Thumbs.db), and test coverage exclusions (.profraw, cobertura.xml). Contains duplicate OS file entries that should be consolidated.
.github/copilot-instructions.md	Comprehensive 253-line guide covering project structure, build/test/lint processes, security requirements for Solana private keys, CI/CD checks, and development guidelines. Contains outdated "Known Issues" section describing compilation errors that have already been fixed, and references anyhow error handling library that isn't currently in dependencies.

[Copilot]

Spelling error in "Compilation Error". The correct term should be "Compilation Errors" (plural) since multiple files are affected, or keep it as "Compilation Error" but clarify it's a single type of error affecting multiple locations.

Suggested change

	- **Compilation Error**: The project currently has compilation errors due to the use of `Keypair::from_bytes(&key_bytes)` which was available in earlier versions of solana-sdk but has been removed in version 3.0.0. This affects three files:
	- **Compilation Errors**: The project currently has compilation errors due to the use of `Keypair::from_bytes(&key_bytes)` which was available in earlier versions of solana-sdk but has been removed in version 3.0.0. This affects three files:

[Copilot]

The instruction mentions using "anyhow" for error handling, but anyhow is not currently listed in Cargo.toml dependencies. It's only used in unintegrated modules (config.rs and logging.rs). The active codebase uses standard Result types like io::Result. Consider clarifying that anyhow will be used once those modules are integrated, or that it should be added as a dependency for new error handling code.