chore: Bump version to 1.0 (Unity-Technologies#2046)

* chore: Bump version to 1.0

* Add PR number to changelog

chore: Update test-project-tools-integration to use pre.8 (Unity-Tech…

…nologies#2033)

chore: Bump package version to pre.9 (Unity-Technologies#1956)

Add validation jobs as dependency of Publish and Promote

fix: check NetworkPrefabsList count before rendering GUI (Unity-Techn…

…ologies#1861)

chore: Bump package version to pre.6 for ngo and adapter (Unity-Techn…

…ologies#1771)

chore: Increment package versions for NGO 1.0.0-pre.5 and update chan…

…gelogs [backport to release/1.0.0] (Unity-Technologies#1627)

chore: increment package versions for NGO 1.0.0-pre.4 and update chan…

…gelogs (Unity-Technologies#1563)

Official 1.0.0-pre.3 released through the Unity Package Registry

Official package version 1.0.0-pre.2 released through the Unity Packa…

…ge Registry