Post monorepo cleanup

* Revamp CI GHA workflow
* Remove CI scripts from components
* Normalize READMEs to point back to monorepo

.github/workflows/athena.yml

@@ -1,12 +0,0 @@
-name: Athena
-
-on:
-  pull_request:
-    branches:
-      - 'master'
-  schedule:
-    - cron: '37 0 * * *' # Nightly at 00:37
-
-jobs:
-  CI:
-    uses: athena-framework/actions/.github/workflows/ci.yml@master

README.md

@@ -1,6 +1,6 @@
 # Negotiation
 
-[![CI](https://github.com/athena-framework/negotiation/workflows/CI/badge.svg)](https://github.com/athena-framework/negotiation/actions?query=workflow%3ACI)
+[![CI](https://github.com/athena-framework/athena/workflows/CI/badge.svg)](https://github.com/athena-framework/athena/actions/workflows/ci.yml)
 [![Latest release](https://img.shields.io/github/release/athena-framework/negotiation.svg)](https://github.com/athena-framework/negotiation/releases)
 
 Framework agnostic [content negotiation](https://tools.ietf.org/html/rfc7231#section-5.3) library based on [willdurand/Negotiation](https://github.com/willdurand/Negotiation).
@@ -25,12 +25,4 @@ If using the component as part of Athena, also checkout the [external documentat
 
 ## Contributing
 
-1. Fork it (https://github.com/athena-framework/negotiation/fork)
-2. Create your feature branch (`git checkout -b my-new-feature`)
-3. Commit your changes (`git commit -am 'Add some feature'`)
-4. Push to the branch (`git push origin my-new-feature`)
-5. Create a new Pull Request
-
-## Contributors
-
-- [George Dietrich](https://github.com/blacksmoke16) - creator and maintainer
+[Report issues](https://github.com/athena-framework/athena/issues) and send [Pull Requests](https://github.com/athena-framework/athena/pulls) in the [main Athena repository](https://github.com/athena-framework/athena).