[PierreRaybaut]

Follows #1 (merged).

Adds a Scientific camera simulator... tool. It opens DataLab's instrument window (DataLab-Platform/DataLab#384, merged): a live frame on the left, the camera settings on the right, and Acquire to add frames to the workspace, ready for the Camera methods.

• Settings in four tabs: Acquisition (single exposure or exposure sequence, frames per exposure, shutter, dark frames), Illumination (photoelectron rate, vignetting, dust shadows), Sensor (size, ADC resolution, conversion gain, read noise, offset, PRNU, DSNU, row and column patterns, defective pixels, serial number) and Dark current (rate, non-uniformity, hot pixels, amplifier glow). Settings that do not apply to the chosen mode or shutter state are greyed out.
• The live view shows one flat or dark frame with its mean, standard deviation and saturated-pixel ratio, on the full ADC color range.
• Each acquisition goes to a new group "Camera SN ÔǪ - acquisition 001" with titles such as Flat 10 ms 01 and the exposure-time and frame-role metadata. With the shutter open, dark frames are taken at the longest exposure. An exposure sequence is ready for the photon transfer method, or for the dark-current method when taken with the shutter closed.
• Live frames reuse 64 noise streams; acquisitions use the next ones and are capped at 20 megapixels.
• The tool is declared in both the Desktop and Web adapters; demo.series_images becomes public.

Tests

• 5 new unit tests (settings, preview, single series, sequence with darks, size limit); full suite: 158 passed.

Docs: new doc/camera-simulator.md, linked from the README and doc/simulation.md; CHANGELOG updated.

Assisted-by: Claude Opus 5.5