[Time Strip] allow user to adjust width and height of swimlanes

[davetsay]

Closes #7957

Describe your changes:

• custom width adjustment, will adjust all swimlane widths
  • custom width adjustment inside a nested time strip
• custom height adjustment, based on percentage of viewing space
  • stacked plots scaled per composition
• persist width adjustment
• persist height adjustment
• fix handles for nested plans not resizing
• fix handles for plan labels nested in time strips resizing all
• have flexible layouts use new composable for flex container reactivity
  • verify existing e2e tests
• make resizeHandle reusable
• e2e tests for time strips

All Submissions:

• Have you followed the guidelines in our Contributing document?
• Have you checked to ensure there aren't other open Pull Requests for the same update/change?
• Is this a notable change that will require a special callout in the release notes? For example, will this break compatibility with existing APIs or projects that consume these plugins?

Author Checklist

• Changes address original issue?
• Tests included and/or updated with changes?
• Has this been smoke tested?
• Have you associated this PR with a type: label? Note: this is not necessarily the same as the original issue.
• Have you associated a milestone with this PR? Note: leave blank if unsure.
• Testing instructions included in associated issue OR is this a dependency/testcase change?

Reviewer Checklist

• Changes appear to address issue?
• Reviewer has tested changes by following the provided instructions?
• Changes appear not to be breaking changes?
• Appropriate automated tests included?
• Code style and in-line documentation are appropriate?

[codecov]

Codecov Report

Attention: Patch coverage is 50.53763% with 46 lines in your changes missing coverage. Please review.

Project coverage is 56.89%. Comparing base (32a0e15) to head (af912db).

Files with missing lines	Patch %	Lines
src/utils/vue/useDragResizer.js	16.00%	21 Missing ⚠️
src/utils/vue/useFlexContainers.js	55.00%	18 Missing ⚠️
src/plugins/timeline/TimelineViewLayout.vue	58.33%	5 Missing ⚠️
src/plugins/timeline/Container.js	83.33%	1 Missing ⚠️
src/plugins/timeline/TimelineObjectView.vue	0.00%	1 Missing ⚠️

Additional details and impacted files

@@                            Coverage Diff                            @@
##           7936-add-discrete-event-visualization    #8003      +/-   ##
=========================================================================
- Coverage                                  57.18%   56.89%   -0.30%     
=========================================================================
  Files                                        686      689       +3     
  Lines                                      27825    27916      +91     
  Branches                                    2741     2742       +1     
=========================================================================
- Hits                                       15913    15883      -30     
- Misses                                     11569    11691     +122     
+ Partials                                     343      342       -1     

Flag	Coverage Δ
e2e-ci	62.89% <47.36%> (+0.01%)	⬆️
e2e-full	23.47% <0.00%> (-18.26%)	⬇️
unit	48.67% <24.73%> (-0.09%)	⬇️

Files with missing lines	Coverage Δ
...s/flexibleLayout/components/ContainerComponent.vue	10.63% <ø> (ø)
...ugins/flexibleLayout/components/FlexibleLayout.vue	8.05% <ø> (ø)
src/plugins/flexibleLayout/plugin.js	100.00% <ø> (ø)
src/plugins/plan/components/PlanView.vue	59.49% <ø> (ø)
src/plugins/timeline/TimelineViewProvider.js	100.00% <100.00%> (ø)
src/ui/components/swim-lane/SwimLane.vue	64.51% <100.00%> (+5.25%)	⬆️
src/ui/layout/Container.js	100.00% <ø> (ø)
src/ui/layout/Frame.js	100.00% <ø> (ø)
src/ui/layout/ResizeHandle/ResizeHandle.vue	15.38% <ø> (ø)
src/plugins/timeline/Container.js	83.33% <83.33%> (ø)
... and 4 more

... and 10 files with indirect coverage changes

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