Add IF3602

Adds IF3600 Ultra Low Noise Dual Matched N-Channel JFET.

KLC violations are due to the JFET symbol copied from the Device library.

Datasheet: https://www.interfet.com/jfet-datasheets/jfet-if3602-interfet.pdf

Screenshots:

• Remove the instructional content of this template
• Provide a URL to a datasheet for the symbol(s) you are contributing
• An example screenshot image is very helpful
• Ensure that the associated footprints match the official footprint library
  • A new fitting footprint must be submitted if the library does not yet contain one.
• If there are matching footprint PRs, provide link(s) as appropriate
• Check the output of the automated check scripts - fix any errors as required
• Give a reason behind any intentional library convention rule violation.