fix agent-framework pyright issue and added examples to CI

[lilyydu]

1. Pyright was failing on the ai-agentframework example.
The agent-framework package pulls in a bunch of optional sub-packages via its [all] extra. One of those — agent-framework-azure-ai-search==0.0.0a1 — is a broken placeholder alpha that accidentally ships an empty agent_framework/init.py in its wheel. When installed, that empty file overwrites the real one from agent-framework-core, so Python sees an empty agent_framework namespace and pyright can't find Agent, AgentSession, tool, etc.

Replaced imports with agent-framework-core and agent-framework-openai packages, resycned lock file

2. CI wasn't running on examples
Our workflows were only set up to run when files under packages/ changed. This bug was undetected when the sample was added, so proposing to run our examples in CI too.

[Copilot]

Pull request overview

Fixes Pyright type-check failures in the examples/ai-agentframework workspace member by switching from the agent-framework wrapper package to agent-framework-core[all], and updates CI path filters so changes under examples/ trigger the main workflow.

Changes:

• Update examples/ai-agentframework to depend on agent-framework-core[all] instead of agent-framework.
• Regenerate uv.lock to remove agent-framework and lock the new dependency graph for the example.
• Expand .github/workflows/ci.yml path filters to include examples/** on PRs and pushes to main.

Reviewed changes

Copilot reviewed 2 out of 3 changed files in this pull request and generated 2 comments.

File	Description
uv.lock	Removes agent-framework and locks agent-framework-core[all] for the ai-agentframework example.
examples/ai-agentframework/pyproject.toml	Switches the example dependency to agent-framework-core[all] to resolve Pyright import/type visibility.
.github/workflows/ci.yml	Ensures CI runs when examples/** changes (not only packages/**).