Align derive placeholder formatting with TemplateFormatter variants

[RAprogramm]

Summary

• update the derive formatter generation to match on every TemplateFormatter variant and invoke the corresponding ::core::fmt trait or alternate formatting helper
• extract helper functions to keep the generated tokens clear while preserving pointer semantics and the default display path
• bump crate versions to 0.5.5/0.1.3, refresh the README dependency snippets and document the change in the changelog

Testing

• cargo +nightly fmt --
• cargo +1.90.0 clippy -- -D warnings
• cargo +1.90.0 build --all-targets
• cargo +1.90.0 test --all
• cargo +1.90.0 doc --no-deps
• cargo deny check
• cargo audit

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https://chatgpt.com/codex/tasks/task_e_68cce3e90278832b85aa0850144c3314

[chatgpt-codex-connector]

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[chatgpt-codex-connector]

[P0] Generate string literal using non-tokenizable String

The new helper format_with_alternate constructs a String with format! and then interpolates it directly into quote! (::core::write!(f, #format_string, #expr)?;). quote! requires the interpolated value to implement ToTokens, which String does not, so the proc-macro crate will fail to compile as soon as this arm is exercised. The previous implementation used a literal format string and compiled successfully. Convert the computed string into a token type (e.g. syn::LitStr::new(&format_string, Span::call_site())) before interpolation.

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