Adds PDF report for Size Distribution

[jellybean2004]

Description

This PR adds PDF reports for the Size distribution perspective.

This also factors out parameter formatting from Corfunc, and getting plot images from Fitting perspectives to be used here.

Fixes #3258

How Has This Been Tested?

Manually ran and created reports.

Review Checklist:

Documentation

• There is nothing that needs documenting
• Documentation changes are in this PR
• There is an issue open for the documentation (link?)

Installers

• There is a chance this will affect the installers, if so
  • Windows installer (GH artifact) has been tested (installed and worked)
  • MacOSX installer (GH artifact) has been tested (installed and worked)
  • Wheels installer (GH artifact) has been tested (installed and worked)

Licensing

• The introduced changes comply with SasView license (BSD 3-Clause)

[Copilot]

Pull request overview

This PR adds report generation support for the Size Distribution perspective by leveraging the existing ReportBase HTML/PDF reporting pipeline, while also refactoring common report utilities for reuse across perspectives.

Changes:

• Added getReport() (and supports_reports) to the Size Distribution perspective, including embedding currently-shown plots into the report.
• Factored out parameter key/value formatting into a shared format_report_parameters() helper and reused it from Corfunc.
• Centralized “collect live plot figures by dataset id” logic into PlotHelper.figures_for_plot_ids() and reused it in the Fitting report flow.

Reviewed changes

Copilot reviewed 6 out of 6 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
src/sas/qtgui/Utilities/Reports/reports.py	Adds reusable report-parameter formatting helper.
src/sas/qtgui/Utilities/Reports/__init__.py	Re-exports the new formatting helper from the Reports package.
src/sas/qtgui/Plotting/PlotHelper.py	Adds helper to fetch active Matplotlib figures by plot/data ids.
src/sas/qtgui/Perspectives/SizeDistribution/SizeDistributionPerspective.py	Implements report generation + plot image collection for Size Distribution.
src/sas/qtgui/Perspectives/Fitting/ReportPageLogic.py	Refactors image collection to use the new PlotHelper utility.
src/sas/qtgui/Perspectives/Corfunc/CorfuncPerspective.py	Switches to shared parameter formatting helper for reports.

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