collaborative compiler rewrite doc added

compiler-rewrite.md added as an appendix to serve as a central document for authors to share their opinions and can then be synthesised into one piece of work as opposed to multiple separate blog posts or similar.

Author: teehee

src/SUMMARY.md

@@ -226,6 +226,7 @@
 [Appendix C: Code Index](./appendix/code-index.md)
 [Appendix D: Compiler Lecture Series](./appendix/compiler-lecture.md)
 [Appendix E: Bibliography](./appendix/bibliography.md)
+[Appendix F: Compiler Rewrite](./appendix/compiler-rewrite.md)
 
 [Appendix Z: HumorRust](./appendix/humorust.md)
 

src/appendix/compiler-rewrite.md

@@ -0,0 +1,27 @@
+# Compiler Rewrite Discussion
+
+Some experienced Rust developers have floated the idea of a possible rewrite of the Rust compiler. Recording motivations, lessons learned, limitations, unexpected pros and cons etc. of the current compiler will be a useful historical document for the open source community regardless of whether a rewrite of the compiler happens. 
+
+---
+
+## [author name](https://github.com/author_name) Notes
+
+
+
+## [author name](https://github.com/author_name) Notes
+
+
+
+## [author name](https://github.com/author_name) Notes
+
+
+
+## Key Points 
+-
+-
+-
+-
+
+
+# Summary
+