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/src/forms/pin-input/context.ts

@@ -0,0 +1,33 @@
+import type { ComputedRef, Ref } from 'vue';
+import type { Direction } from '../../utilities/config-provider';
+import { useContextFactory } from '@robonen/vue';
+
+export interface PinInputContext {
+  value: Ref<string[]>;
+  length: ComputedRef<number>;
+  mask: ComputedRef<boolean>;
+  otp: ComputedRef<boolean>;
+  type: ComputedRef<'text' | 'number'>;
+  disabled: ComputedRef<boolean>;
+  placeholder: ComputedRef<string>;
+  dir: ComputedRef<Direction>;
+  isComplete: ComputedRef<boolean>;
+  inputs: Ref<HTMLInputElement[]>;
+  register: (el: HTMLInputElement) => void;
+  unregister: (el: HTMLInputElement) => void;
+  setAt: (index: number, char: string) => void;
+  clearAt: (index: number) => void;
+  focusIndex: (index: number) => void;
+  /**
+   * Move focus relative to `index` by `delta` (`±1`) or to an absolute edge,
+   * skipping disabled cells. RTL-aware navigation is resolved by the caller.
+   */
+  focusRelative: (index: number, delta: number, absolute?: 'home' | 'end') => void;
+  /** Index of the first cell whose value is still empty, or `-1` if all filled. */
+  firstEmptyIndex: () => number;
+}
+
+const ctx = useContextFactory<PinInputContext>('PinInputContext');
+
+export const providePinInputContext = ctx.provide;
+export const usePinInputContext = ctx.inject;