HPCC-8872 DOCS:ECL Watch Docs

Fix HPCC-8872 DOCS:ECL Watch Docs
Document the new ECL Watch.
Draft of New version of ECL Watch.
ReBased on to 5.0 and new images added
Post Plygrd split off different branch.(merged)
First  POST MERGE/REBASE commit.

Signed-off-by: g-pan <greg.panagiotatos@lexisnexis.com>