chore: upgrade rust-toolchain to 1.95.0 and fix clippy warnings

[eval-exec]

Summary

• Upgrade rust-toolchain from 1.92.0 to 1.95.0
• Switch from plain text rust-toolchain to TOML format (rust-toolchain.toml)
• Fix 3 clippy useless_conversion warnings (redundant .into_iter() calls)

[Copilot]

Pull request overview

Upgrades the project’s Rust toolchain to 1.95.0 (using rust-toolchain.toml) and removes a few redundant iterator conversions to satisfy newer clippy lints.

Changes:

• Replace plain-text rust-toolchain with rust-toolchain.toml targeting Rust 1.95.0.
• Fix clippy useless_conversion warnings by removing redundant .into_iter() calls in a few loops.

Reviewed changes

Copilot reviewed 6 out of 6 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
src/subcommands/wallet.rs	Removes redundant .into_iter() when chaining derived key sets.
src/subcommands/util.rs	Removes redundant .into_iter() when chaining derived key sets in path search.
src/subcommands/tx.rs	Removes redundant .into_iter() on outputs_data() in output iteration.
rust-toolchain.toml	Introduces TOML toolchain pin to Rust 1.95.0.
rust-toolchain	Removes the old plain-text toolchain pin (1.92.0).

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