use ESM module syntax & minor cleanups

The biggest change here is moving various element classes under
more scope-specific directories, which helps to avoid circular
dependencies and is just cleaner to navigate and expand in the
future.

Otherwise this is a largely uncritical port to ESM module syntax!
There are probably a number of changes and other cleanups that
remain much needed.

Whenever I make changes to tui-lib it's hard to believe it's
already been <INSERT COUNTING NUMBER HERE> years since the
previous time. First commits are from January 2017, and the
code originates a month earlier in KAaRMNoD!

1 files changed, 16 insertions, 0 deletions

diff --git a/ui/controls/index.js b/ui/controls/index.js
new file mode 100644
index 0000000..e99add1
--- /dev/null
+++ b/ui/controls/index.js
@@ -0,0 +1,16 @@
+//
+// Import mapping:
+//
+//   primitives ->
+//     Button
+//     FocusBox
+//     TextInput
+//
+//     Form -> ListScrollForm
+//
+
+export {default as Button} from './Button.js'
+export {default as FocusBox} from './FocusBox.js'
+export {default as Form} from './Form.js'
+export {default as ListScrollForm} from './ListScrollForm.js'
+export {default as TextInput} from './TextInput.js'