Propagate tomlfmt check failures

[legokichi]

Summary

• replace find -execdir ... \; tomlfmt invocations with shell loops that propagate nonzero exits
• apply the same tomlfmt check behavior in the GitHub Actions fmt job
• clean generated Cargo.toml.new files before and after dry-run checks

Validation

• git diff --check -- Makefile .github/workflows/check.yml
• exact CI shell block: exits 255 and reports a tomlfmt failure in leptos-browser/Cargo.toml, confirming failure propagation
• make fmt-check: exits 2 via cargo tomlfmt -d error 255 on the same existing manifest formatting issue

[github-actions]

Terraform Plan Results

Terraform Plan Output

No changes. Your infrastructure matches the configuration.

Terraform has compared your real infrastructure against your configuration
and found no differences, so no changes are needed.

Pusher: @legokichi, Action: pull_request

[github-actions]

Terraform Plan Results

Terraform Plan Output

No changes. Your infrastructure matches the configuration.

Terraform has compared your real infrastructure against your configuration
and found no differences, so no changes are needed.

Pusher: @legokichi, Action: pull_request