feat(primitives): media-editor components, category reorg, perf + type cleanup

Reorganize components into category folders (forms/canvas/overlays/etc.); add the
media-editor headless family (timeline, curve-editor, waveform, crop, color
picker, etc.); apply perf fixes (O(1) collection lookups, plain-object drag
state, gesture-leak teardown, shallowRef color state, rect caching) and replace
source `any` with proper types.

vue/primitives/eslint.config.ts

@@ -1,4 +1,4 @@
-import { base, compose, imports, stylistic, typescript, vue } from '@robonen/eslint';
+import { base, compose, imports, stylistic, tests, typescript, vue } from '@robonen/eslint';
 
 export default compose(base, typescript, vue, imports, stylistic, {
   name: 'primitives/overrides',
@@ -6,4 +6,4 @@ export default compose(base, typescript, vue, imports, stylistic, {
   rules: {
     '@stylistic/no-multiple-empty-lines': 'off',
   },
-});
+}, tests);