Update the README with Linux package / installer info (RPM/DEB)

Author: shahmishal

README.md

@@ -25,6 +25,71 @@ swift-installer-scripts
            └ ...
 ~~~
 
+## Linux Packages (RPM/Deb)
+
+Currently Swift on Linux is distributed via tarball and Docker, and
+we would like to start supporting RPM and Debs officially on swift.org.
+The goal is to provide a seamless install process for Swift on Linux by
+utilizing the platform’s native package manager (RPM/Deb).
+
+
+* Step 1. Develop native packages / installers for the distributions
+* Step 2. Offer the native packages / installers through swift.org
+  * Support all officially supported Linux platforms
+  * Code signed by swift.org certificate
+  * Repository hosted on swift.org
+* Step 3. Offer the native packages / installer through official repositories
+for the various platforms
+  * Work with official repositories to accept package specs
+  * Deprecate swift.org packages / installer repository
+* Step 4. Deprecate swift.org Linux tarballs
+
+### Package Info
+* Package name: swiftlang
+* License: Apache 2.0
+* Maintainer: [email protected]
+* URL: https://swift.org
+* Description:
+```
+Swift is a general-purpose programming language built using
+a modern approach to safety, performance, and software design
+patterns.
+
+The goal of the Swift project is to create the best available
+language for uses ranging from systems programming, to mobile
+and desktop apps, scaling up to cloud services. Most
+importantly, Swift is designed to make writing and maintaining
+correct programs easier for the developer.
+```
+
+## Tasks
+
+### RPM Package Manager (RPM)*
+
+- [ ] SR-### Create spec file
+- [ ] SR-### Setup CI job to build the rpm package
+- [ ] SR-### Code sign rpm package with swift.org certificate
+- [ ] SR-### Host the rpm package on swift.org
+- [ ] SR-### Host the rpm repository on swift.org
+- [ ] SR-### Verify the rpm package and repository
+- [ ] SR-### Update swift.org download page
+- [ ] SR-### Work with official repositories to accept package specs
+
+*For each platform, we will start with CentOS 8.
+
+### Debian Package (Deb)*
+
+- [ ] SR-### Create Debs spec file
+- [ ] SR-### Setup CI to build the deb package
+- [ ] SR-### Code sign package with swift.org certificate
+- [ ] SR-### Host the deb package on swift.org
+- [ ] SR-### Host the deb repository on swift.org
+- [ ] SR-### Verify the deb package and repository
+- [ ] SR-### Update swift.org download page
+- [ ] SR-### Work with official repositories to accept package specs
+
+*For each platform, we will start with Ubuntu 20.04
+
 ## Contributing
 
 Before contributing, please read [CONTRIBUTING.md](CONTRIBUTING.md).