New scripted versions for LQFP-52 footprints

This adds scripted versions of the LQFP 52 footprints script PR: https://github.com/pointhi/kicad-footprint-generator/pull/245

The 0.65mm pitch version uses ipc definition for small pin pitch (0.625mm) to allow for enough pad to pad clearance.

LQFP-52-1EP_10x10mm_P0.65mm_EP4.8x4.8mm (plus thermal via)

datasheet: https://www.onsemi.com/pub/Collateral/848H-01.PDF

LQFP-52-1EP_10x10mm_P0.65mm_EP4.8x4.8mm:
  size_source: 'https://www.onsemi.com/pub/Collateral/848H-01.PDF'
  body_size_x:
    nominal: 10
    tolerance: 0
  body_size_y:
    nominal: 10
    tolerance: 0
  overall_size_x:
    nominal: 12
    tolerance: 0
  overall_size_y:
    nominal: 12
    tolerance: 0
  lead_width:
    minimum: 0.22
    maximum: 0.4
  lead_len:
    minimum: 0.45
    maximum: 0.75
  pitch: 0.65
  num_pins_x: 13
  num_pins_y: 13

  EP_size_x: 4.8
  EP_size_y: 4.8
  EP_num_paste_pads: [3, 3]

  thermal_vias:
    count: [4, 4]
    drill: 0.2
    paste_via_clearance: 0.1
    paste_between_vias: 1
    paste_rings_outside: 1
    EP_paste_coverage: 0.65
    grid: [1, 1]

LQFP-52_10x10mm_P0.65mm

datasheet: https://www.nxp.com/docs/en/package-information/98ARL10526D.pdf

LQFP-52_10x10mm_P0.65mm:
  size_source: 'https://www.nxp.com/docs/en/package-information/98ARL10526D.pdf'
  # ipc_density: 'least'
  force_small_pitch_ipc_definition: True
  body_size_x:
    nominal: 10
  body_size_y:
    nominal: 10
  overall_size_x:
    nominal: 12
  overall_size_y:
    nominal: 12
  lead_width:
    nominal: 0.325
  lead_len:
    minimum: 0.45
    maximum: 0.75
  pitch: 0.65
  num_pins_x: 13
  num_pins_y: 13