New Experiment esm-flat10

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Adding the following new data.

{
    "id": "esm-flat10",
    "type": [
        "wcrp:experiment",
        "cmip7"
    ],
    "activity": [
        "C4MIP"
    ],
    "description": "esm-flat10 is newly introduced for CMIP7 as an emissions-driven idealised experiment to quantify sensitivity of the earth system to CO2 emissions. It requires fully-coupled AOGCM and BGC models with carbon cycle \u201cemissions-driven\u201d  The esm-flat10 experiment branches from a stable esm-piControl simulation, with a constant annual prescribed anthropogenic flux of carbon of 10PgC/year into the atmosphere, with globally homogenous emissions for initial (minimum) period, 0-150 years. Longer runs - 300 years \u2013 are recommended.  It serves as an emissions-driven experiment to diagnose the Transient Climate Response to cumulative Emissions (TCRE), which is the warming from pre-industrial levels observed after the emission of 1000PgC in a transient scenario.  Used with the partner experiments esm-flat10-zec and esm-flat10-cdr it forms a vital part of assessment of TCRE, ZEC and reversibility. In particular these experiments make assessment of ZEC easier than CMIP6 because: the experiment is emissions-driven from the outset and does not require a change in configuration at the branch point and the branch point is common across all models.  more details and analysis can be found here: https://egusphere.copernicus.org/preprints/2023/egusphere-2023-2127/ https://egusphere.copernicus.org/preprints/2024/egusphere-2024-3356/",
    "label": "esm-flat10",
    "long-label": "10 PgC/yr constant CO2 emissions experiment",
    "minimum-number-of-years": "150",
    "model-realms": [
        {
            "id": "aogcm",
            "is-required": true
        },
        {
            "id": "bgc",
            "is-required": true
        },
        {
            "id": "aer",
            "is-required": false
        },
        {
            "id": "chem",
            "is-required": false
        },
        {
            "id": "ism",
            "is-required": false
        }
    ],
    "parent-experiment": [
        "esm-piControl"
    ],
    "start-date": "none",
    "sub-experiment": "none",
    "tier": "1"
}

Resolves #20