[clang] [BoundsSafety] Initial documentation for -fbounds-safety (PR #70749)

[Dan Liew via cfe-commits]

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+==============================================
+-fbounds-safety: Enforcing bounds safety for C
+==============================================
+
+.. contents::
+   :local:
+
+Overview
+========
+
+-fbounds-safety is a C extension to enforce bounds safety to prevent out-of-bounds (OOB) memory accesses, which remain a major source of security vulnerabilities in C. -fbounds-safety aims to eliminate this class of bugs by turning OOB accesses into deterministic traps.
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delcypher wrote:

Should `-fbounds-safety` be quoted to be monospaced?

https://github.com/llvm/llvm-project/pull/70749