EPIC: Plot refactor metadata

[M-Kusumgar]

This can be the temp branch for the plot cleanup and we can just freely push what we want to this whenever we need it during the plot cleanup epic, for reference, the type of metadata is:

type Warning = {
    locations: string[],
    text: string
};

type FilterId = string

type StateFilterId = string

type FilterType = {
    id: FilterId,
    column_id: string,
    options: FilterOption[]
}

type FilterRef = {
    filterId: FilterId,
    label: string,
    stateFilterId: string
}

type PlotSettingEffect = {
    setFilters?: FilterRef[],
    setMultiple?: StateFilterId[],
    setFilterValues?: Record<StateFilterId, string[]>,
    setVisible?: StateFilterId[]
}

type PlotSettingOption = {
    id: string,
    label: string,
    effect: PlotSettingEffect
}

type PlotSetting = {
    id: string,
    label: string,
    options: PlotSettingOption[],
   value?: string,
    visible?: boolean
}

type PlotSettingsControl = {
    defaultEffect: PlotSettingEffect,
    plotSettings: PlotSetting
}

type NewMetadata = {
    // this has all possible filter types i.e.
    // area_id, area_level, calendar_quarter, indicator, sex, age_group
    filterTypes: FilterType[],

    // this has extra info about indicators such as scale, format, accuracy, but
    // this will have the same length as the indicator filter type options
    // we just dont need everything in here in the filterTypes
    indicators: Indicator[],

    plotSettingsControl: {
        choropleth: PlotSettingsControl,
        barchart: PlotSettingsControl,
        table: PlotSettingsControl,
        bubble: PlotSettingsControl
    },

    warnings: Warning[]
}

[codecov]

Codecov Report

Attention: Patch coverage is 98.69281% with 2 lines in your changes are missing coverage. Please review.

Project coverage is 98.53%. Comparing base (f5c5736) to head (db7779b).
Report is 3 commits behind head on master.

Files	Patch %	Lines
R/endpoints.R	93.10%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #493      +/-   ##
==========================================
+ Coverage   98.49%   98.53%   +0.03%     
==========================================
  Files          29       29              
  Lines        2389     2449      +60     
==========================================
+ Hits         2353     2413      +60     
  Misses         36       36              

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