Refactored device component docs

docs/models/dcim/frontport.md

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+# Front Ports
+
+Front ports are pass-through ports used to represent physical cable connections that comprise part of a longer path. For example, the ports on the front face of a UTP patch panel would be modeled in NetBox as front ports.
+
+Each front port is mapped to a specific rear port on the same device. A single rear port may be mapped to multiple rear ports.