refactor(packages): dissolve ui/ and rename sdk/ to scaffold/

git mv per the regrouping RFC: the five human-collaboration seams and
tui join packages/interaction/, app-boot becomes packages/boot/, and
jsonrpc joins the renamed scaffold/ (formerly sdk/) as its server half
beside client/protocol/create-sdk/helper/scripts/telemetry, whose
folders drop the legacy sdk- prefix. Three new group README triplets
replace the ui/ and sdk/ ones; tsconfig references/paths/globs,
knip keys, vitest globs, gate scripts, catalogs, docs, and the
lockfile follow. Adds the four settled FIXME rename markers
(dsh-sdk-server, dsh-sdk-telemetry, dsh-sdk-helper, dsh-sdk-scripts).

The scaffold folders diverge from their npm names until those renames
land, so tsconfig.base.json maps the three affected names explicitly
beside the group wildcard. Also repairs two pre-existing stale-path
classes the strengthened sweep surfaced: docs/web-styling.md's retired
web-ui host package and type-model spec fixture-literal joins.

app-boot's three Loader-composition specs time out at the default 5s
under full-suite parallel load on this filesystem (pre-existing;
pass isolated with --testTimeout=30000); interaction/scaffold/boot
suites otherwise green (687 passed).

packages/scaffold/create-sdk/tests/built-artifacts.e2e.ts

@@ -0,0 +1,28 @@
+import { execFile } from 'node:child_process'
+import { existsSync } from 'node:fs'
+import { join } from 'node:path'
+import { fileURLToPath } from 'node:url'
+import { promisify } from 'node:util'
+import { describe, expect, it } from 'vitest'
+
+const execFileAsync = promisify(execFile)
+const repoRoot = fileURLToPath(new URL('../../../../', import.meta.url))
+const createBin = join(repoRoot, 'packages/scaffold/create-sdk/lib/bin.js')
+const scriptsBin = join(repoRoot, 'packages/scaffold/scripts/lib/bin.js')
+
+describe.skipIf(!existsSync(createBin) || !existsSync(scriptsBin))(
+  'SDK built artifacts',
+  () => {
+    it('runs the published dsh-sdk bin help path under plain Node', async () => {
+      const result = await execFileAsync(process.execPath, [scriptsBin, '--help'], { encoding: 'utf8' })
+      expect(result.stdout).toContain('Usage: dsh-sdk <command>')
+      expect(result.stderr).toBe('')
+    })
+
+    it('runs the published create-sdk bin help path under plain Node', async () => {
+      const result = await execFileAsync(process.execPath, [createBin, '--help'], { encoding: 'utf8' })
+      expect(result.stdout).toContain('Usage: create-sdk [directory]')
+      expect(result.stderr).toBe('')
+    })
+  },
+)