[compiler] Add changelog (#32983)

Adds CHANGELOG.md.

This entry contains changes from the very first beta
`19.0.0-beta-9ee70a1-20241017` to `19.1.0-rc.1`.

lauren committed 1y ago

24dfad3abb2786e96ff7efe90ab9fff5644af9f0

Parent: bb74190

Committed by GitHub <noreply@github.com> on 4/24/2025, 8:20:02 PM