Convert cwes list to markdown with fewer rows and columns (#737)

* Update verbiage because we have a list of CWE-IDs per issue 529.

* Clean CWE-IDs list to only exploit_possible=yes, eliminate need for side scrolling, add hyperlinks, and create a markdown version of the csv per issues 530 and 713.

* markdown lint

* Fix broken link to cwe examples and remove cwe csvs file to enforce a single source of truth.

* Make the linkchecker happy

* Really fix links this time

Author: sei-renae