start fleshing out documentation sections

src/content/docs/showbridge/dictionary.md

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+---
+title: Dictionary
+---
+
+- **router**: throughout documentation I will use the term router to refer to configured/running instance of showbridge
+- **modules**: modules are configured instances that can produce or consume message like a TCP server or a UDP client
+- **routes**: routes take messages coming from a module (input), do some optional processing and send that message to a module (output)
+- **processors**: processors process messages, the processors are localized to the route the processor is a part of. Examples of processors or turning bytes into an OSC message or parsing a string into an integer