web: improve password experience

This commit disassembles PromptStage and places function that don't
need a reference to the PromptStage object into a collection of
maps between the Stage type and the prompt associated with it.  (In
a better world, this would be a great place to try some post-Midgard
mplementation of itemtype/itemid/itemprop).

This surfaced the nature of the relationship between Password and
Password (Repeat), allowing us to modify both to show password
strength and password matching for the "change password" dialog.

web/README.md

@@ -3,6 +3,15 @@
 This is the default UI for the authentik server. The documentation is going to be a little sparse
 for awhile, but at least let's get started.
 
+# Standards
+
+-   Be flexible in what you accept as input, be precise in what you produce as output.
+-   Mis-use is always a crash. A component that takes the ID of an HTMLInputElement as an argument
+    should throw an exception if the element is anything but an HTMLInputElement ("anything" includes
+    non-existent, null, undefined, etc.).
+-   Single Responsibility is ideal, but not always practical. To the best of your obility, every
+    object in the system should do one thing and do it well.
+
 # Comments
 
 **NOTE:** The comments in this section are for specific changes to this repository that cannot be
@@ -21,3 +30,7 @@ settings in JSON files, which do not support comments.
     -   `compilerOptions.plugins.ts-lit-plugin.rules.no-incompatible-type-binding: "warn"`: lit-analyzer
         does not support generics well when parsing a subtype of `HTMLElement`. As a result, this threw
         too many errors to be supportable.
+-   `package.json`
+    -   `prettier` should always be the last thing run in any pre-commit pass. The `precommit` script
+        does this, but if you don't use `precommit`, make sure `prettier` is the _last_ thing you do
+        before a `git commit`.