add bold project (#64)

Signed-off-by: Rui Chen <[email protected]>

README.md

@@ -20,6 +20,7 @@ If you find a well-maintained library that is not yet included here, welcome to
   - [Documentation and Testing](#documentation-and-testing)
   - [Package and Version Manager](#package-and-version-manager)
   - [Utility](#utility)
+  - [Linker](#linker)
 - [Data Structure and Algorithm](#data-structure-and-algorithm)
 - [String Processing](#string-processing)
 - [File format processing](#file-format-processing)
@@ -123,6 +124,10 @@ TOC is generated by [markdown-toc](https://github.com/jonschlinkert/markdown-toc
 - [Arnau478/hevi](https://github.com/Arnau478/hevi) : A minimalistic and modernized hex viewer, written in Zig.
 - [gaskam/workspace](https://github.com/gaskam/workspace) : A powerful Zig-based tool to manage all your GitHub repositories with ease.
 
+### Linker
+
+- [kubkon/bold](https://github.com/kubkon/bold) : **bold** is a drop-in replacement for Apple’s system linker `ld`
+
 ## Data Structure and Algorithm
 
 - [hello-algo-zig](https://github.com/codingonion/hello-algo-zig) : **Zig** programming language codes for the famous public project [《Hello, Algorithm》|《 Hello，算法 》](https://github.com/krahets/hello-algo) about data structures and algorithms.