docs: stage I3 -- documentation rewritten under docs/solo

Short pages by feature (getting started, messages, contacts, navigation,
tools, settings, lock, hardware) instead of one page per OLED screen, with
Wio Tracker L2 differences as notes; facts checked against the code
(keyboard scripts vs. hold-for-accents, {batt}/{dist}, L2 limits and
settings layout). Developer guides and build flags under docs/solo/developer.
Old docs/solo_features and its ~50 screenshots removed; a hero banner and
three simulator screenshots added; links updated.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

docs/solo/tools.md

@@ -0,0 +1,114 @@
+# Tools
+
+On joystick devices, the tools are in **Tools**, grouped into Location, Comms
+and System. The navigation tools are on the [Navigation](./navigation.md)
+page, Nodes and Admin on [Contacts](./contacts.md).
+
+> [!NOTE]
+> **Wio Tracker L2:** the tools are apps on the home screen: Messages, Nodes,
+> Settings, Compass, Clock, GPS, Bot, Repeater, Admin, Diagnostics. The trail,
+> live sharing and the locator are on the map (its tools button) and in
+> Settings › Map.
+
+## Clock
+
+The **Clock** home page shows the time, the date and up to three fields you
+choose (hold Enter): battery, temperature, humidity, pressure, altitude
+(barometric or GPS), light, CO₂, GPS position, satellites, contacts, unread
+messages. The time comes from GPS or the phone app; the time zone is in
+Settings.
+
+**Enter** on the clock opens the clock tools:
+
+- **Alarm**: a time, repeating daily, on weekdays, at weekends or once. It
+  rings with the screen off or locked, but not after a shutdown.
+- **Timer**: a countdown that rings when it reaches zero, whatever screen
+  you're on.
+- **Stopwatch**.
+
+Any key silences the ringing; it stops by itself after a minute.
+
+## Remote bot
+
+**Tools › Bot** answers messages for you. It watches your direct messages, one
+channel and one room, each switched on separately:
+
+- **Trigger and reply**: when a message contains the trigger (several can be
+  separated by commas, `*` matches any message), the bot sends the reply. The
+  reply can use placeholders, plus `{name}` (the sender) and `{hops}`.
+- **Commands**: messages starting with `!` get live data back:
+
+  | Command | Reply |
+  | ------- | ----- |
+  | `!ping` | `pong` |
+  | `!batt`, `!temp`, `!time`, `!loc` | battery, temperature, time, position |
+  | `!hops` | how many hops the command took |
+  | `!status` | battery, position and time |
+  | `!help` | the list of commands |
+
+  Several in one message get one reply: `!batt !time` → `4.10V | 14:30`.
+- **Actions** (off by default) let the command change the device: `!buzz`
+  (sounds the buzzer to find it), `!gps on` / `!gps off`, `!gps fix` (turns
+  the GPS on, waits for a good fix and sends it), `!advert`.
+
+**DM allow = Fav** limits the DM bot to your favourites, and **quiet hours**
+stop trigger replies at night (commands still answer). Replies are rate
+limited so two bots can't answer each other forever. The room bot uses the
+room's saved login.
+
+## Auto-advert
+
+**Tools › Auto-advert** sends an advert with your position every 30 seconds
+to 1 hour, so others see you in their Nearby list. With it on at both ends
+and Settings › Sound › **AD sound** set, each device beeps when it hears the
+other: a hands-free "still in range".
+
+## Repeater
+
+**Tools › Repeater** makes the device relay other people's packets while it
+keeps working as a companion. By default it relays on a separate repeater
+profile (the community's repeater frequency) and switches back when you turn
+it off; **Network = Current** relays on your own frequency instead.
+
+Optional filters keep a mobile repeater from adding noise: skip adverts, a
+maximum hop count, **Yield** (let fixed repeaters go first), a minimum SNR,
+drop duplicates already relayed by someone else, and relay only your
+**scopes**. Diagnostics shows how much it forwards.
+
+## Ringtones
+
+**Tools › Ringtone** composes two melodies of up to 32 notes (pitch, octave,
+length, tempo). Use them for notifications in Settings › Sound, or for a
+single contact or channel from its options.
+
+> [!NOTE]
+> **Wio Tracker L2:** the melody editor is under Settings › Sound.
+
+## Diagnostics
+
+**Tools › Diagnostics** shows live counters (packets received and sent by
+type, forwarded, errors), memory, the radio's noise floor and the last
+packet's signal; a **System** tab with the firmware and radio settings; and a
+**Font** tab with a sample of every script the font covers. Hold Enter on the
+live tab to reset the counters.
+
+> [!NOTE]
+> **Wio Tracker L2:** the Diagnostics app, with a **Noise** tab that
+> measures the noise floor over time.
+
+## GPIO
+
+*Wio Tracker L1 only.* **Tools › GPIO** sets four spare pins as input,
+output or (GPIO1–2) analog input, shows their level and switches outputs. The
+bot's `!gpio1`…`!gpio4` commands read and set the same pins.
+
+## GPS and sensors
+
+The **GPS** home page shows the fix and satellites; **Sensors** shows the
+readings of the sensors the board has. **GPS pwr** in Settings › System turns
+the GPS off between fixes to save battery; anything that needs your position
+(the trail, live share, the locator) keeps it on.
+
+> [!NOTE]
+> **Wio Tracker L2:** the **GPS** app draws a sky plot of the satellites and
+> each one's signal strength.