Add 'manual' script variant

lib/plausible_web/plugs/tracker.ex

priv/tracker/js/analytics.js

priv/tracker/js/plausible.compat.exclusions.hash.js

priv/tracker/js/plausible.compat.exclusions.hash.local.js

...acker/js/plausible.compat.exclusions.hash.local.manual.js

...ble.compat.exclusions.hash.local.manual.outbound-links.js

.../plausible.compat.exclusions.hash.local.outbound-links.js

priv/tracker/js/plausible.compat.exclusions.hash.manual.js

...plausible.compat.exclusions.hash.manual.outbound-links.js

...ker/js/plausible.compat.exclusions.hash.outbound-links.js

priv/tracker/js/plausible.compat.exclusions.js

priv/tracker/js/plausible.compat.exclusions.local.js

priv/tracker/js/plausible.compat.exclusions.local.manual.js

...lausible.compat.exclusions.local.manual.outbound-links.js

...er/js/plausible.compat.exclusions.local.outbound-links.js

priv/tracker/js/plausible.compat.exclusions.manual.js

...r/js/plausible.compat.exclusions.manual.outbound-links.js

.../tracker/js/plausible.compat.exclusions.outbound-links.js

priv/tracker/js/plausible.compat.hash.js

priv/tracker/js/plausible.compat.hash.local.js