fix(component): drop view from mixin attribute to load on Lucee 7 (#2)

Lucee 7 enforces native trait composition on the `component mixin="..."`
attribute — it tries to load each comma-separated value as a CFML
component path at compile time. The previous declaration

    component mixin="controller,view" output="false"

asks Lucee to load `view.cfc` as a trait. There is no `view.cfc` on the
component path (Wheels has no `view` mixin target — view helpers go
into `controller` mixins because views render in the controller's
variables scope). The missing trait makes the whole component fail to
compile.

The error surfaces with a misleading message:

    invalid component definition, can't find component
    [vendor.wheels-basecoat.Basecoat]

…which points at the OUTER component (Basecoat) rather than the
unresolved trait (view), making the actual cause hard to find. I spent
hours assuming the package directory's hyphen was the issue before
isolating this.

Net effect on Lucee 7: every `wheels packages add wheels-basecoat`
install resulted in a successful extract but no helper activation. The
package showed up in `application.wheels.failedPackages` rather than
`application.wheels.mixins`. `#uiButton(...)#`, `#uiCard(...)#`, etc.
all failed with `function UIBUTTON not found`.

Fix: drop `view` from the mixin attribute, leaving `mixin="controller"`.
The package's `package.json` already declares `provides.mixins:
"controller"` correctly — that's the actual source of truth for the
framework's PackageLoader. The component-level attribute is a
historical convention that's now obsolete.

Verified end-to-end on a fresh VM running 4.0.0-SNAPSHOT+1644 with
the matching framework fixes (wheels-dev/wheels#2373 + #2374) patched in:

    Before:
      $ wheels packages add wheels-basecoat
      Installed wheels-basecoat@1.0.1
      $ wheels stop && wheels start
      $ curl localhost:8080/main/index   # view calls #uiButton(...)#
      ERROR: No matching function [UIBUTTON] found

    After (with this fix):
      $ ... same flow ...
      <button type="button" class="btn">Save</button>

The same fix is needed in wheels-dev/wheels-hotwire (which has the
same `component mixin="controller,view"` declaration). PR for that
follows.

Lucee 5/6 may not enforce this strictly, which is why the bug went
undetected until Lucee 7 became the default in Wheels 4.0.

Co-authored-by: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: bpamiri

Basecoat.cfc

@@ -4,7 +4,7 @@
  * Generates shadcn/ui-quality HTML using Basecoat CSS classes.
  * Works with or without wheels-hotwire.
  */
-component mixin="controller,view" output="false" {
+component mixin="controller" output="false" {
 
 	function init() {
 		this.version = "3.0";