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/mod.rs

@@ -1,3 +1,4 @@
+//! Code for GGML and GGUF files
 use crate::{CpuStorage, DType, Device, Result, Shape, Storage, Tensor};
 use k_quants::*;
 use std::borrow::Cow;