Align axes across stacked plots

[phfix]

Summary

Align axis dimensions across stacked plots so adjacent plot canvases line up more consistently.

Details

This computes shared left/bottom axis dimensions across the plots in a docker and reapplies those minimums before replotting.

The implementation was tested with static data. It also tries to minimize recomputation so it remains suitable for streaming updates.

Scope

Stacked plot layout and axis alignment only.

Closes #1274
Related to #1208 and #160

[phfix]

Is the test "[ros2-humble / build (pull_request)])" fail related to my commit?
I have no knowlege about the ros2-humble by gihub built in
copilot sugges adding a dependecy to the test setup.

.github/workflows/ros2-humble.yaml
Add one apt install step after setup-ros and before action-ros-ci:

  - name: Install missing ROS deps (Humble)
    run: |
      sudo apt-get update
      sudo apt-get install -y ros-humble-rosidl-typesupport-c

[phfix]

Update: I found a second stale-alignment case when curves are added/removed on an existing plot. This update now also triggers deferred realignment on curve-list changes, and the cache recompute check now considers axis widget width/height in addition to extent.

[phfix]

Again @copilot have a suggestion about the error workflow errors in macos
[macos / macos-build (macos-14, arm64) (pull_request)]
[macos / macos-build (macos-14, x64) (pull_request)]

Summary:
Add one step before Conan install:

- name: Set CMAKE_PREFIX_PATH
  run: echo "CMAKE_PREFIX_PATH=$(brew --prefix qt@5)" >> $GITHUB_ENV

No other changes are strictly required. This helps Conan (and CMake) find Qt5 and should resolve your thrift/Qt5 error.