Documentation update about overall process of data reduction and use latest sciline html wrapper.

[YooSunYoung]

Fixes #22 Fixes #40

[YooSunYoung]

I wanted to use mermaid instead of png file, but the docs build didn't work as expected... I'm not sure why...

Here is the mermaid graph I wrote:

stateDiagram
    direction TB
    Step0: Starting Experiment
    Step1: Setting up Measurement Strategy
    Step0 --> Step1
    state ECDC {
        Step2: Data Readout from Detectors
    }
    Step1 --> ECDC
    state SCIPP {
        Step3.0: TOA to TOF
    }
    ECDC --> SCIPP
    state DIALS {
        direction LR
        Step3.1: 1. Spot Finding
        Step3.2: 2. TOF to &lambda
        Step3.3: 3. Indexing
        Step3.4: 4. Refine Indexing
        Step3.5: 5. Spot Integration
        Step3.1 --> Step3.2
        Step3.2 --> Step3.3
        Step3.3 --> Step3.4
        Step3.4 --> Step3.5
    }
    SCIPP --> DIALS
    state pyscale: pyscale {
        Step3.6: Scaling (temporarily using LSCALE)
    }
    DIALS --> pyscale
    state CCP4 {
        direction LR
        Step3.7: Merging, AIMLESS
        Step3.8: I to SFs
        Step3.7 --> Step3.8
    }
    pyscale --> CCP4
    state PHENIX {
        direction LR
        Step4.0: Phasing
        Step4.0 --> Step4.1
        state MODELCOMPLETED {
            state refine <<choice>>
            state map <<choice>>
            Step4.1: Model Completion
            Step4.2: Refinement
            Step4.3: MapCalculation
            Step4.4: Done
            Step4.1 --> Step4.2
            Step4.2 --> refine
            refine --> Step4.4
            refine --> Step4.3
            Step4.3 --> map
            map --> Step4.4
            map --> Step4.1
        }
    }
    CCP4 --> PHENIX
    Step5: Finished Experiment
    PHENIX --> Step5

[SimonHeybrock]

Mermaid should work according to https://github.com/mgaitan/sphinxcontrib-mermaid?tab=readme-ov-file#markdown-support.

[YooSunYoung]

Mermaid should work according to https://github.com/mgaitan/sphinxcontrib-mermaid?tab=readme-ov-file#markdown-support.

Yeah... but whenever I build the docs, it keeps showing up as a raw text or a raw code-snippet... Is there any other projects using mermaid in the docs?

[YooSunYoung]

@Justin-Bergmann just approved after reviewing with me in person ...! Can anyone @scipp/ess-maintainers review this please..? :D Then I'll release it...!

[YooSunYoung]

And Justin said he'll send the latex code for the diagram. I'll update them later once I have it.