Add three-panel powder diffraction plot with measured/calculated, Bragg ticks, and residuals #199

Job	Run time
env-prepare	2s
source-test (ubuntu-24.04)	5m 2s
source-test (windows-2022)	9m 29s
source-test (macos-15)	4m 10s
package-test (windows-2022)	16m 23s
package-test (ubuntu-24.04)	9m 40s
package-test (macos-15)	6m 37s
run-reusable-workflows / dashboard	1m 33s
	52m 56s

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