[Action] Add ActionEndpointInfo and action graph count APIs

[minggangw]

Adds new ROS 2 action-graph query capabilities to rclnodejs, exposing action client/server counts and per-endpoint metadata through the Node API and corresponding TypeScript types.

Changes:

• Add Node.countActionClients/countActionServers and endpoint-info query APIs for actions.
• Introduce ActionEndpointInfo (JS + TS) to represent aggregated action endpoint metadata.
• Extend native graph bindings/utilities and add tests/type-tests for the new APIs.

Fix: #1570

[Copilot]

Pull request overview

Adds new ROS 2 action-graph query capabilities to rclnodejs, exposing action client/server counts and per-endpoint metadata through the Node API and corresponding TypeScript types.

Changes:

• Add Node.countActionClients/countActionServers and endpoint-info query APIs for actions.
• Introduce ActionEndpointInfo (JS + TS) to represent aggregated action endpoint metadata.
• Extend native graph bindings/utilities and add tests/type-tests for the new APIs.

Reviewed changes

Copilot reviewed 8 out of 11 changed files in this pull request and generated 4 comments.

Show a summary per file

File	Description
types/node.d.ts	Declares new Node action graph count + endpoint-info APIs.
types/base.d.ts	Wires in the new action_endpoint_info.d.ts reference.
types/action_endpoint_info.d.ts	Adds TS declarations for ActionEndpointInfo and related endpoint info shapes.
test/types/index.test-d.ts	Adds d.ts assertions for the new Node APIs and ActionEndpointInfo.
test/test-action-graph.js	Adds runtime tests for action client/server counts and endpoint info queries.
src/rcl_utilities.h	Declares JS conversion helper for action endpoint info arrays (ROS_VERSION >= 5000).
src/rcl_utilities.cpp	Implements action endpoint info conversion + adds null-string guards for endpoint fields.
src/rcl_graph_bindings.cpp	Adds native bindings for action count and action endpoint info queries.
lib/node.js	Exposes new Node methods and maps native endpoint info into ActionEndpointInfo instances.
lib/action/endpoint_info.js	Implements ActionEndpointInfo JS wrapper over native endpoint data.
index.js	Exports ActionEndpointInfo from the package entrypoint.

Suppressed comments (2)

src/rcl_graph_bindings.cpp:437

• countActionClients/countActionServers are exported under ROS_VERSION >= 2605, but their implementations should be ROS_VERSION >= 5000 only. As-is, builds with ROS_VERSION between 2605 and 4999 will reference undefined symbols. Move the two exports into the existing ROS_VERSION >= 5000 block (keep the service info exports under >= 2605).

#if ROS_VERSION >= 2605
  exports.Set("countActionClients",
              Napi::Function::New(env, CountActionClients));
  exports.Set("countActionServers",
              Napi::Function::New(env, CountActionServers));

test/test-action-graph.js:309

• This test assumes the action endpoint info APIs exist. On distros older than Rolling, getActionServersInfoByAction returns null, and waitForEndpointInfo will throw when accessing .length. Skip this test unless DistroId.ROLLING.

  it('Test getActionServersInfoByAction', async function () {
    const infos = await waitForEndpointInfo(

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[coveralls]

coverage: 91.047% (-0.06%) from 91.102% — minggangw:fix-1570 into RobotWebTools:develop