[wiki] move the https://github.com/dart-lang/sdk/wiki to the docs/ dir

Change-Id: I28db796fadcc111d97d3589bf3988ea0bbb8e18a
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/366682
Reviewed-by: Alexander Thomas <athom@google.com>
Commit-Queue: Devon Carew <devoncarew@google.com>

docs/Kernel-developer-notes.md

@@ -0,0 +1,37 @@
+> [!IMPORTANT]
+> This page was copied from https://github.com/dart-lang/sdk/wiki and needs review.
+> Please [contribute](../CONTRIBUTING.md) changes to bring it up-to-date -
+> removing this header - or send a CL to delete the file.
+
+---
+
+# Developer notes for working on kernel
+
+## How to test changes on pkg/kernel:
+
+Run dartanalyzer in strong mode:
+```
+(cd pkg/kernel && dartanalyzer --strong bin lib test)
+```
+
+Run unit tests of kernel, front_end, and dart2js that are directly affected:
+```
+./tools/test.py pkg/kernel -mrelease --checked
+./tools/test.py pkg/front_end -mrelease --checked
+./tools/test.py dart2js/kernel -mrelease --checked
+```
+
+Run end-to-end tests using dartk + VM:
+```
+./tools/test.py -m release -c dartk language
+```
+
+Optionally (this is slow) run end-to-end tests using AOT:
+```
+./tools/build.py dart_precompiled_runtime
+./tools/test.py -cdartkp -rdart_precompiled language co19
+```
+
+Comparing the output of compiling dart2js before and after the change. This [script][1] can make it easier to compare the results.
+
+[1]: https://gist.github.com/asgerf/adde37ed58fe984d53b82d362187c777