fix(ci): add gtest to the Anomaly Detector recipe (per-plugin build needs it)

The standalone root CMakeLists' find_package(GTest REQUIRED) runs for every
per-plugin build, but toolbox_anomaly_detector/conanfile.py never listed gtest
(every other plugin recipe does). The omission was masked because the Linux
per-plugin leg died earlier resolving pj_scripting_core; with that spurious
dependency gone (prev commit), Conan now succeeds and CMake configure failed on
"Could NOT find GTest". Add gtest/1.17.0 to the recipe, matching the other plugins.

Verified via the per-plugin path (./build.sh toolbox_anomaly_detector): GTest
resolves, configure succeeds, the .so links.

NOTE: this leg still fails to COMPILE against the published SDK (0.13.0) because
anomaly_detector.cpp adopts the 5-arg setSaveFilePicker(default_suffix) contract,
which lives in the not-yet-merged SDK default_suffix PR. That is the known, planned
convergence dependency — it greens once the unified SDK PR merges and SDK_VERSION
is bumped. This commit removes the gtest blocker so #138 is the single remaining one.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_0122VUqQqWd1KVQQfhrG7632

Author: Alvvalencia

toolbox_anomaly_detector/conanfile.py

@@ -21,6 +21,9 @@ class ToolboxAnomalyDetectorConan(ConanFile):
     requires = (
         f"plotjuggler_sdk/{_SDK_VERSION}",
         "nlohmann_json/3.12.0",
+        # GTest backs the plugin's unit tests; the root CMakeLists' find_package(GTest)
+        # runs for every per-plugin build, so each plugin's recipe must provide it.
+        "gtest/1.17.0",
     )
     default_options = {
         "*:shared": False,