Seed Tensaku's annotation size so first use skips the welcome prompt

Tensaku shows a "Pick a default annotation size factor" dialog until
its persisted state names one. Neither config.toml nor the CLI flag
suppresses it, so ship the state file itself.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

default/tensaku/state.toml

@@ -0,0 +1 @@
+annotation-size-factor = 2.0

docs/file-layout.md

@@ -97,6 +97,7 @@ default/**                     ──►  omarchy-settings    /usr/share/omarchy
   │                                                       → /etc/skel/.bashrc (post_install cp -f)
   ├─ hypr/toggles/flags.lua                             /etc/skel/.local/state/omarchy/toggles/hypr/
   ├─ nautilus-python/extensions/*.py                    /etc/skel/.local/share/nautilus-python/extensions/
+  ├─ tensaku/state.toml                                 /etc/skel/.local/state/tensaku/state.toml
   ├─ uwsm/env.d/10-omarchy                              /usr/share/uwsm/env.d/
   ├─ environment.d/*.conf                               /usr/lib/environment.d/
   ├─ fontconfig/conf.avail/50-omarchy.conf              /usr/share/fontconfig/conf.avail/