chore(pack): drop Railway branding from our own docs, comments, and examples

Rewrites our own comments, help text, and example READMEs that named
Railway or linked railway.app so they describe what they do instead.
Retargets the changelog generator and RELEASE.md's Actions/release
links at this repo. Leaves upstream issue links, the MIT copyright,
and the builder/runtime/frontend image references untouched -- those
still point at ghcr.io/railwayapp because we don't publish our own
copies of those images yet.

Co-authored-by: Hanzo Dev <[email protected]>

examples/go-mod/go.mod

@@ -1,4 +1,4 @@
-module github.com/railwayapp/railpack
+module example.com/go-mod
 
 go 1.23
 

examples/node-vite-react-router-spa/README.md

@@ -62,7 +62,6 @@ The containerized application can be deployed to any platform that supports Dock
 - Azure Container Apps
 - Digital Ocean App Platform
 - Fly.io
-- Railway
 
 ### DIY Deployment
 

examples/node-vite-react-router-ssr/README.md

@@ -62,7 +62,6 @@ The containerized application can be deployed to any platform that supports Dock
 - Azure Container Apps
 - Digital Ocean App Platform
 - Fly.io
-- Railway
 
 ### DIY Deployment
 

examples/ruby-rails-postgres/README.md

@@ -9,9 +9,7 @@ tags:
 
 # Rails Starter Example
 
-This is a [Ruby on Rails](https://rubyonrails.org/) starter app that connects to a Railway Postgres database and supports [Action Cable](https://guides.rubyonrails.org/action_cable_overview.html).
-
-[![Deploy on Railway](https://railway.app/button.svg)](https://railway.app/new/template/sibk1f)
+This is a [Ruby on Rails](https://rubyonrails.org/) starter app that connects to a Postgres database and supports [Action Cable](https://guides.rubyonrails.org/action_cable_overview.html).
 
 ## ✨ Features
 
@@ -22,11 +20,10 @@ This is a [Ruby on Rails](https://rubyonrails.org/) starter app that connects to
 
 ## 💁‍♀️ How to use
 
-- [Create a Railway project with the Postgres plugin](https://railway.app/project?plugins=postgresql)
-- Connect to your Railway project with `railway link`
+- Provision a Postgres database and set `DATABASE_URL`
 - Install Ruby requirements `bundle install`
-- Migrate the database `railway run rake db:migrate`
-- Run Rails `railway run bin/rails server`
+- Migrate the database `rake db:migrate`
+- Run Rails `bin/rails server`
 
 ## 📝 Notes