CDC

[eatyourpeas]

Overview

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Code changes

CDC(US) charts initial implementation
Note does not include Fenton charts though space has been included for them

Documentation changes (done or required as a result of this PR)

• src/chartdata/cdc_*: adding the data: these files take their data directly from the CDC website, so are not calculated by the API.
• type and interface files to update the reference type to include cdc and the datasets
• fixes to the getDomainsAndData and getFilteredMidParentalHeightData functions to include CDC data - these functions filter the centile data to the viewport or filter the midparental height centiles to a narrow strip close to the latest measurement if supplied.
• referenceText: updates the label to signpost to users which reference is used and where published
• tooltips.ts: small fix to render chronological_decimal_age_error if present
• addOrdinalSuffix: fix to add suffixes to numbers with decimal places
• add data and stories to demonstrate midparental height both for CDC and UKWHO
• package.json: bump minor version
• .gitignore: add a fenton folder for future

[eatyourpeas]

as discussed with wider team - merging