swift : linux support (ggml-org#6590)

- Package.swift now supports conditional compilation based on OS
- Allows for package to be used by SPM on Non-Apple platforms

Co-authored-by: Steven Prichard <[email protected]>

support/fix OPs GGML_TYPE_IQ4_NL, GGML_TYPE_IQ4_XS, GGML_TYPE_IQ3_XXS…

…, GGML_TYPE_IQ3_S, GGML_TYPE_IQ2_XXS, GGML_TYPE_IQ2_XS, GGML_TYPE_IQ2_S, GGML_TYPE_IQ1_S, GGML_TYPE_IQ1_M (ggml-org#6521)

llama : fix integer overflow during quantization (ggml-org#6063)

ci : remove tidy-review (ggml-org#6021)