Reorganize twenty-ui into best-practice component domains and per-component folders (#21745)

Reorganizes `twenty-ui`'s component organization to follow how the best
UI libraries (MUI, Mantine, Base UI, Polaris) structure their source,
now that the package has stabilized.

**Taxonomy** — dissolves the meaningless `components/` junk-drawer and
the 107-file `display/` mega-category. New domains/subpaths:
`data-display`, `typography`, `icon`, `surfaces`; `feedback` and
`layout` absorb the rest (banners/callout/info + placeholders →
feedback; modal/card → surfaces; motion + separators → layout).

**Per-component layout** — every component is now
`<domain>/<ComponentName>/<ComponentName>.tsx` with colocated
styles/stories/types, `internal/` for private helpers and `parts/` for
re-exported compound sub-parts. The redundant inner `/components/` is
gone. `icon` and `json-visualizer` are kept as cohesive subsystems.

**Also:** adds a tree-shakeable root barrel (`import { Button } from
'twenty-ui'`), the generator now owns `individual-entry.ts`, and a real
barrel-leak bug is fixed (private `internals/` parts were leaking into
the public API).

Consumer imports (~1.2k files) and the `twenty-sdk` UI aggregator were
updated by codemod. The change is **export-neutral** except 16
intentionally-removed private internals symbols (all verified
unconsumed). Gates green: typecheck, lint, build, size-limit, storybook.


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packages/twenty-ui/src/input/FloatingButtonGroup/FloatingButtonGroup.tsx

@@ -0,0 +1,51 @@
+import { clsx } from 'clsx';
+import React from 'react';
+import { isDefined } from '@ui/utilities/utils/isDefined';
+
+import {
+  type FloatingButtonPosition,
+  type FloatingButtonProps,
+} from '@ui/input/FloatingButton/FloatingButton';
+
+import styles from './FloatingButtonGroup.module.scss';
+
+export type FloatingButtonGroupProps = Pick<FloatingButtonProps, 'size'> & {
+  children: React.ReactElement[];
+  className?: string;
+};
+
+export const FloatingButtonGroup = ({
+  children,
+  size,
+  className,
+}: FloatingButtonGroupProps) => {
+  return (
+    <div className={clsx(styles.container, className)}>
+      {React.Children.map(children, (child, index) => {
+        let position: FloatingButtonPosition;
+
+        if (index === 0) {
+          position = 'left';
+        } else if (index === children.length - 1) {
+          position = 'right';
+        } else {
+          position = 'middle';
+        }
+
+        // eslint-disable-next-line @typescript-eslint/no-explicit-any
+        const additionalProps: any = {
+          position,
+          size,
+          applyShadow: false,
+          applyBlur: false,
+        };
+
+        if (isDefined(size)) {
+          additionalProps.size = size;
+        }
+
+        return React.cloneElement(child, additionalProps);
+      })}
+    </div>
+  );
+};