docs: add proper README

Signed-off-by: Alexander Bartolomey <occloxium@gmail.com>

README.md

@@ -0,0 +1,22 @@
+# go-ipfix
+
+[![Go Reference](https://pkg.go.dev/badge/github.com/zoomoid/go-ipfix.svg)](https://pkg.go.dev/github.com/zoomoid/go-ipfix)
+
+go-ipfix is a library for working with IPFIX messages. It supports encoding and decoding of IPFIX messages using a *io.Reader*-style interface.
+It complies with RFC 7011, as well as supporting most other major IPFIX RFCs:
+
+- RFC 5103: Bidirectional Flow Export Using IP Flow Information Export (IPFIX)
+- RFC 5610: Exporting Type Information for IP Flow Information Export (IPFIX) Information Elements
+- RFC 5655: Specification of the IP Flow Information Export (IPFIX) File Format
+- RFC 6313: Export of Structured Data in IP Flow Information Export (IPFIX)
+
+## Getting started
+
+- API documentation and examples are available via [pkg.go.dev](https://pkg.go.dev/github.com/zoomoid/go-ipfix)
+- The [./addons](./addons) directory contains an implementation of a `ipfix.FieldCache` and `ipfix.TemplateCache` that uses `etcd` for state management
+
+## Contributing
+
+This is a one-person project with (currently) no practical deployment. If you'd like to adopt go-ipfix, require any features or want to
+fix any bugs (of which there are probably quite a few remaining), feel free to fork the repository and open a pull request, I promise to
+do my best to ensure your efforts make it to the library.

addons/etcd/README.md

@@ -1,4 +1,5 @@
 # go-ipfix/addons/etcd
 
 `go-ipfix/addons/etcd` is a FieldCache/TemplateCache implementation using etcd under the hood for *distributed* and *strongly-consistent* management of templates and fields.
-It may be used to scale-out a collector and serves as an example of how to improve state management for IPFIX connections.
+It may be used to scale-out a collector and serves as an example of how to improve state management for IPFIX connections.
+