feat: migrate from thiserror to snafu

[joe-p]

Migrates all the errors from thiserror to snafu. The main difference is that snafu needs enum variants to be a struct so that's what most of this diff is. This was mostly work done by GPT-5, but I don't think we need to go over it with a fine-toothed comb since we have another story for unifying error handling and any problems can be caught then. For now though, every test is passing.

This PR won't be merged until the following PRs are merged. Merge conflicts are anticipated and will be resolved in this branch.

• feat!: introduces multisignature abstractions in utils #218
• feat: add resource population support #225
• Add validations to asset config and asset freeze txns #231
• chore: relocate tests #232
• chore: extract FFI txn types out of lib.rs #233

Future PRs should use this branch has a base until it is merged

[Copilot]

Pull Request Overview

This PR migrates error handling from the thiserror crate to the snafu crate across the entire Algorand Rust SDK codebase. The migration requires changing error enum variants from simple variants to struct-like variants, as snafu expects named fields for error data.

• Updates all error enums from thiserror::Error to snafu::Snafu with appropriate display attributes
• Converts error variant patterns from Error(inner) to Error { field: inner } format
• Updates error construction and matching throughout the codebase to use the new struct-like syntax

Reviewed Changes

Copilot reviewed 127 out of 128 changed files in this pull request and generated 1 comment.

File	Description
scripts/sanity.sh	Adds API generation commands to the sanity check script
Multiple indexer/algod client files	Updates error handling from thiserror to snafu pattern
crates/*/Cargo.toml	Replaces thiserror dependency with snafu in workspace crates
Test files	Updates error pattern matching to use new struct-like syntax

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[PatrickDinh]

LGTM

[engineering-ci]

🎉 This PR is included in version 1.0.0-alpha.50 🎉

The release is available on GitHub release

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