chore: drop obsolete scripts and a stale dev dependency, make knip report clean

- Nine one-off scripts from January and February that nothing references:
  three Ralph wizard drivers that click the start-screen button removed in
  1.50 (against the production port, with a personal case name), a respawn
  monitor with a hardcoded session id, link-detection experiments for
  patterns that no longer exist, and two screenshot and data helpers.
- @types/uuid: uuid 14 ships its own types and TypeScript already
  resolves them from the package.
- config/knip.json now describes the workspace layout it runs in (its
  top-level entry and project keys were being ignored), names the manual
  scripts as entries, lists the system binaries tests shell out to, and
  honours @knipignore. `npm run knip` reports nothing; CLAUDE.md says so.
- Two more unused tap helpers in the mobile test toolkit.
- Docs that pointed at files which no longer exist: the browser testing
  guide (four deleted test files), the orchestrator panel's file name, two
  spawn modules in the Ralph guide, the respawn mock utilities.

Co-Authored-By: Claude Fable 5.2 <noreply@anthropic.com>

config/knip.json

@@ -1,16 +1,19 @@
 {
-  "$schema": "https://unpkg.com/knip@5/schema.json",
-  "entry": [
-    "scripts/*.mjs",
-    "scripts/*.js",
-    "scripts/watch-subagents.ts",
-    "scripts/remotion/Root.tsx",
-    "scripts/remotion/index.ts",
-    "test/**/*.test.ts",
-    "test/mobile/vitest.config.ts",
-    "test/**/*.mjs"
-  ],
-  "project": ["src/**/*.{ts,tsx}", "scripts/**/*.{ts,tsx,mjs,js}", "test/**/*.{ts,mjs}"],
+  "$schema": "https://unpkg.com/knip@6/schema.json",
+  "workspaces": {
+    ".": {
+      "entry": [
+        "scripts/*.{mjs,js,mts,ts}",
+        "scripts/dev/*.mjs",
+        "scripts/remotion/Root.tsx",
+        "scripts/remotion/index.ts",
+        "test/**/*.test.ts"
+      ],
+      "project": ["src/**/*.{ts,tsx}", "scripts/**/*.{ts,tsx,mjs,js,mts}", "!scripts/remotion/**", "test/**/*.{ts,mjs}"]
+    }
+  },
   "ignoreExportsUsedInFile": true,
-  "ignoreDependencies": ["@remotion/cli", "@remotion/transitions", "esbuild", "agent-browser"]
+  "ignoreDependencies": ["@remotion/cli", "@remotion/transitions"],
+  "ignoreBinaries": ["ffprobe", "ffmpeg", "wslpath", "vm_stat", "jq", "codex", "script", "mkfifo"],
+  "tags": ["-knipignore"]
 }