Release 0.5.12 (#1091)

.changeset/chilled-tomatoes-visit.md

.changeset/soft-kiwis-protect.md

.changeset/spotty-shoes-poke.md

.changeset/thin-pens-deliver.md

apps/docs/CHANGELOG.md

apps/docs/package.json

packages/autotool/examples/02_nextjs/CHANGELOG.md

packages/autotool/examples/02_nextjs/package.json

packages/autotool/package.json

packages/community/CHANGELOG.md

packages/community/package.json

packages/core/CHANGELOG.md

packages/core/package.json

packages/experimental/CHANGELOG.md

packages/experimental/package.json

packages/llamaindex/CHANGELOG.md

...maindex/e2e/examples/cloudflare-worker-agent/CHANGELOG.md

...maindex/e2e/examples/cloudflare-worker-agent/package.json

packages/llamaindex/e2e/examples/nextjs-agent/CHANGELOG.md

packages/llamaindex/e2e/examples/nextjs-agent/package.json