chore: prepare 0.8.10 release

[leehack]

Summary

• Prepare the core llamadart package for 0.8.10.
• Promote the current cache-default release notes from Unreleased to 0.8.10 in CHANGELOG.md and the current docs recent releases page.
• Align current README, website installation docs, companion READMEs, and the chat app path lockfile with the in-repo 0.8.10 prep version.

Release scope

• Core package version: llamadart 0.8.10.
• Companion package versions remain unchanged: llamadart_llama_cpp_flutter 0.0.6, llamadart_litert_lm_flutter 0.0.2.
• No publish/tag action is included in this PR; companion/core publishing remains a separate post-merge approval boundary.
• Preflight checked pub.dev latest versions before prep: llamadart 0.8.9, llamadart_llama_cpp_flutter 0.0.6, llamadart_litert_lm_flutter 0.0.2.

Test Plan

• dart pub get
• (cd example/chat_app && flutter pub get); kept only the root path package lockfile version change
• dart format --output=none --set-exit-if-changed .
• dart run tool/testing/verify_release_docs_versions.dart
• dart run tool/testing/test_matrix.dart --tier targeted | grep -F release-doc-version-consistency
• dart analyze (exit 0; reports existing info-level lints only)
• dart test -p vm -j 1 --exclude-tags local-only
• dart test -p chrome --exclude-tags local-only
• ./tool/docs/build_site.sh
• ./tool/docs/validate_links.sh
• dart pub publish --dry-run
• git diff --check origin/main...HEAD

[github-actions]

Chat app preview removed for leehack/llamadart-chat-pr-249.

[Copilot]

Pull request overview

Prepares the llamadart core package for the 0.8.10 release by promoting release notes out of Unreleased and aligning all “current install snippet” documentation and example lockfiles with the new version number.

Changes:

• Bumped the core package version to 0.8.10 in pubspec.yaml (and the chat app path lockfile).
• Promoted current release notes from ## Unreleased to ## 0.8.10 in both CHANGELOG.md and the website “Recent Releases” page.
• Updated README + installation docs + companion package READMEs to reference llamadart: ^0.8.10.

Reviewed changes

Copilot reviewed 7 out of 8 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
website/docs/getting-started/installation.md	Updates install snippets to llamadart: ^0.8.10.
website/docs/changelog/recent-releases.md	Promotes “Unreleased” notes to the 0.8.10 section on the website.
README.md	Updates top-level install snippets to llamadart: ^0.8.10.
pubspec.yaml	Bumps core package version from 0.8.9 to 0.8.10.
packages/llamadart_llama_cpp_flutter/README.md	Aligns companion README install snippet with llamadart: ^0.8.10.
packages/llamadart_litert_lm_flutter/README.md	Aligns companion README install snippet with llamadart: ^0.8.10.
example/chat_app/pubspec.lock	Updates the path-resolved llamadart version to 0.8.10.
CHANGELOG.md	Promotes release notes from ## Unreleased to ## 0.8.10.

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.

[Copilot]

Pull request overview

Copilot reviewed 7 out of 8 changed files in this pull request and generated no new comments.