feat: embed daemon JS in binary, eliminate npm install of camoufox-browser

The daemon JS files (daemon.js, server.js, browser.js, protocol.js,
snapshot.js, ipc.js) are now EMBEDDED in the compiled Rust binary via
include_dir! and extracted to ~/.gyandoot/daemon/ on first run.

This eliminates the need to npm install -g camoufox-browser@0.1.0,
which bundles an incompatible camoufox-js@0.9.3 that caused:
- 'Cannot open database' errors
- Re-downloading 298MB browser on every navigation
- Circular install/remove/install loops

Now the daemon imports camoufox-js from the global npm install (v0.11.0)
which is installed by install.sh. Clean, no bundled deps, no conflicts.

Also removed: is_npm_package_installed(), install_npm_package(),
find_daemon_js() — all replaced by gyandoot_browser::daemon::extract_daemon()

install.sh

@@ -218,34 +218,18 @@ install_camoufox_browser() {
 
     if ! command -v npx &>/dev/null && ! command -v npm &>/dev/null; then
         warn "Node.js not found. Skipping Camoufox install."
-        warn "Install Node.js and re-run: npm install -g camoufox-browser@0.1.0"
+        warn "Install Node.js and re-run: npm install -g camoufox-js@0.11.0 && npx --yes camoufox-js@0.11.0 fetch"
         return 0
     fi
 
-    # Step 1: Install npm package (daemon)
-    info "Installing npm package (camoufox-browser@0.1.0)..."
-    npm install -g camoufox-browser@0.1.0 2>&1 | tail -3 || {
-        warn "npm install failed. Try manually: npm install -g camoufox-browser@0.1.0"
-        return 0
-    }
-
-    # Step 2: Override bundled camoufox-js@0.9.3 with v0.11.0
-    # The daemon does: import("camoufox-js") — Node resolves this from
-    # the daemon's own node_modules/ FIRST, before checking global.
-    # So we must REMOVE the bundled copy so Node falls through to global.
-    info "Upgrading bundled camoufox-js to v0.11.0 (daemon dependency)..."
-    local cb_pkg
-    cb_pkg="$(npm root -g 2>/dev/null)/camoufox-browser"
-    if [ -d "$cb_pkg/node_modules/camoufox-js" ]; then
-        rm -rf "$cb_pkg/node_modules/camoufox-js"
-        ok "Removed bundled camoufox-js@0.9.3 from daemon package"
-    fi
-    # Ensure global v0.11.0 exists
+    # Step 1: Install camoufox-js globally (daemon imports this at runtime)
+    info "Installing camoufox-js@0.11.0 (browser engine)..."
     npm install -g camoufox-js@0.11.0 2>&1 | tail -3 || {
-        warn "Failed to install camoufox-js@0.11.0 globally"
+        warn "npm install failed. Try manually: npm install -g camoufox-js@0.11.0"
+        return 0
     }
 
-    # Step 3: Download browser binary
+    # Step 2: Download browser binary
     info "Downloading Camoufox browser binary (~311MB)..."
     npx --yes camoufox-js@0.11.0 fetch 2>&1 || {
         warn "Download failed. Try manually: npx --yes camoufox-js@0.11.0 fetch"