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/LightButton/LightButton.module.scss

@@ -0,0 +1,74 @@
+// State rules below only assign CSS custom properties; the actual
+// declarations live on the flat .button class so twenty-front
+// styled(LightButton) overrides keep beating them at (0,1,0) specificity,
+// exactly like the legacy single Linaria class did.
+// Cascade order replicates the legacy Linaria color switch precedence:
+// (active || focus) > disabled > accent base — later rules win.
+
+.button {
+  align-items: center;
+  background: transparent;
+  border: var(--light-button-border, none);
+  border-radius: var(--t-border-radius-sm);
+  box-shadow: var(--light-button-box-shadow, none);
+  color: var(--light-button-color);
+  cursor: pointer;
+  display: flex;
+  flex-direction: row;
+  font-family: var(--t-font-family);
+  font-weight: var(--t-font-weight-regular);
+  gap: var(--t-spacing-1);
+  height: 24px;
+  padding: 0 var(--t-spacing-2);
+  transition: background 0.1s ease;
+  white-space: nowrap;
+
+  &:hover {
+    background: var(
+      --light-button-hover-bg,
+      var(--t-background-transparent-light)
+    );
+  }
+
+  &:focus {
+    outline: none;
+  }
+
+  &:active {
+    background: var(
+      --light-button-active-bg,
+      var(--t-background-transparent-medium)
+    );
+  }
+
+  &[data-disabled] {
+    cursor: not-allowed;
+  }
+}
+
+.button[data-accent='secondary'] {
+  --light-button-color: var(--t-font-color-secondary);
+}
+
+.button[data-accent='tertiary'] {
+  --light-button-color: var(--t-font-color-tertiary);
+}
+
+.button[data-disabled] {
+  --light-button-color: var(--t-font-color-extra-light);
+  --light-button-hover-bg: transparent;
+  --light-button-active-bg: transparent;
+}
+
+// active || focus turn the text blue even when disabled, matching the legacy
+// switch where the (active || focus) branch came first.
+.button[data-active],
+.button[data-focus] {
+  --light-button-color: var(--t-color-blue);
+}
+
+// focus is gated by !disabled in the component, like the legacy call-site.
+.button[data-focus] {
+  --light-button-border: 1px solid var(--t-color-blue);
+  --light-button-box-shadow: 0 0 0 3px var(--t-color-blue3);
+}