meta: Add CHANGELOG.md, prepare for v0.2 release

CHANGELOG.md

@@ -0,0 +1,27 @@
+Changelog
+=========
+
+v0.2
+----
+
+  * Add new "pushup routes" command (#75)
+  * Add line number and column to syntax errors in parser (#71)
+  * Make Pushup a Nix flake
+  * Bugfix: fix child process handling/cleanup (#108)
+  * Use Go 1.20's new context.WithCancelCause for reloader (#104)
+  * Fix doc link on the Hello world page (Andy Hsieh)
+  * Fix typo in scaffold site content
+  * Add support for profiling Pushup
+  * Add CI linting (Bill Mill)
+  * Bugfix: fix interaction between ^for and ^partial in codegen (#92)
+  * Mangle variable name for fewer naming collisions (Bill Mill)
+  * Remove need for -build-pkg by parsing the go.mod file (#85)
+  * Add -out-file option to specify binary output (Bill Mill)
+  * Display banner.txt on CLI command (#73) (Germán M.S.O)
+  * Bugfix: staticcheck errors (#69) (Bill Mill)
+  * Bugfix: missing trailing slashes in CRUD demo (#66) (Fredrik Holmqvist)
+
+v0.1
+----
+
+  * Initial public release.