CLI helper script and phase 1 of erroneous shard removal (veelenga#453)

* Add util to generate shards report

Report file covers shards that:
* Do not have CI setup
* Have CI but never ran a build
* Have CI but last build was more than 30 days ago

Implement reporter as a cli binary

Implement a way to delete erroneous shards

Some cleanup

Rename some stuff & add more doc comments

Simplify some logic

Remove extra new lines from report

* First pass of erroneous shard removal

Removes shards that do not have CI setup

* Handle GH Actions

* Update owner of clang.cr

* Support shard exemption
change name of luckyframework/record
Fix typo/remove extra whitespace

* Use converter for easier to read VC/CI output

.gitignore

@@ -1,6 +1,11 @@
 /.deps/
 /lib/
 /.crystal/
+bin/
+
+# Don't track the shard report files
+shard_list.yml
+report.md
 
 
 # Libraries don't need dependency lock