Use the correct entity renderer when culling leashed entities

Correctly calculate buffer positions in vertex buffer writer

Flush chunk vertex consumers before changing materials

Fix quad render pass optimization bug with certain multi-layer models

port(1.21.4): Begin initial port to 21.4

Remove Discord link from GH Issues page

Doubly correct

Correct issues page link

Update bug_report.yml

Merge remote-tracking branch 'origin/20.1/forge' into 21.0/neoforge

Choose optimal render pass based on quad texture when possible (#389)

Ensure flag population still happens for vanilla shaded quads

Compress mod icon

Update NG

Update NF