20241118 docs (#2629)

* module docs

* varbuilder gguf docs

* add a link to gguf files

* small additonal mod doc titles

* safetensor docs

* more core docs

* more module docs in canlde_core

* 2 more link fixes

candle-core/src/quantized/gguf_file.rs

@@ -1,6 +1,5 @@
-//! Support for the GGUF file format.
+//! Support for the [GGUF file format](https://github.com/philpax/ggml/blob/gguf-spec/docs/gguf.md).
 //!
-//! Spec: https://github.com/philpax/ggml/blob/gguf-spec/docs/gguf.md
 
 use super::{GgmlDType, QTensor};
 use crate::{Device, Result};