Add credit in README and icon config files.

Author: drn

README.md

@@ -38,3 +38,11 @@ ls
 ❯ time (repeat 100 { colorls })
 ( repeat 100; do; colorls; done; )  24.74s user 11.75s system 96% cpu 37.846 total
 ```
+
+## Credit
+
+The following projects have provided either inspiration, configuration, or
+implementation guidance. Thank you!!
+
+- [athityakumar/colorls](https://github.com/athityakumar/colorls)
+- [reganm/ls](https://github.com/reganm/ls)

icon/files.go

@@ -1,3 +1,7 @@
+// Initial config from:
+// - https://github.com/athityakumar/colorls/blob/master/lib/yaml/files.yaml
+// - https://github.com/athityakumar/colorls/blob/master/lib/yaml/file_aliases.yaml
+
 package icon
 
 import (

icon/folders.go

@@ -1,3 +1,7 @@
+// Initial config from:
+// - https://github.com/athityakumar/colorls/blob/master/lib/yaml/folders.yaml
+// - https://github.com/athityakumar/colorls/blob/master/lib/yaml/folder_aliases.yaml
+
 package icon
 
 // ForFolder - Return rune icon corresponding to input folder name