docs: Discuss how to enable clang sanitizers
docs: Discuss how to enable clang sanitizers

Also fix some broken links and style guide violations in this page.

Change-Id: Ia3dba755f3a0171e8126833a538f2bbff1e9ba7c
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/84126
Pigweed-Auto-Submit: Ted Pudlik <c7372cc3e451acc046049fca9e050bcb2a4a3d11@google.com>
Reviewed-by: Chad Norvell <f2b1b54074a2cea3f685a7cf4fc055999c2f0cd6@google.com>
Commit-Queue: Auto-Submit <14637eda5603879df170705285bf30f5996692f0@pigweed.google.com.iam.gserviceaccount.com>

google/pigweed,google/pigweed,google/pigweed,google/pigweed,google/pigweed,google/pigweed,google/pigweed,google/pigweed,google/pigweed,google/pigweed