docs(evdev): add _snippets dir

Author: haithium

docs/src/evdev/_snippets/device-info.md

@@ -0,0 +1,12 @@
+| Key            | Type        | Description                         |
+| -------------- | ----------- | ----------------------------------- |
+| `path`         | `string`    | Device path                         |
+| `name`         | `string?`   | Human-readable name                 |
+| `bustype`      | `integer`   | Bus type identifier                 |
+| `vendor`       | `integer`   | Vendor ID                           |
+| `product`      | `integer`   | Product ID                          |
+| `version`      | `integer`   | Device version                      |
+| `phys`         | `string?`   | Physical location                   |
+| `uniq`         | `string?`   | Unique identifier                   |
+| `id_aliases`   | `string[]?` | Symlinks under `/dev/input/by-id`   |
+| `path_aliases` | `string[]?` | Symlinks under `/dev/input/by-path` |

docs/src/evdev/_snippets/event-fields.md

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+| Key      | Type       | Description                                                     |
+| -------- | ---------- | --------------------------------------------------------------- |
+| `type`   | `integer`  | Event type, e.g. `EV_KEY` (`1`), `EV_REL` (`2`), `EV_ABS` (`3`) |
+| `code`   | `integer`  | Key/button/axis code, e.g. `KEY_A` (`30`), `REL_X` (`0`)        |
+| `value`  | `integer`  | `0` = release, `1` = press, `2` = repeat (for keys)             |
+| `sec`    | `integer?` | Timestamp seconds                                               |
+| `usec`   | `integer?` | Timestamp microseconds                                          |
+| `device` | `table`    | The Device object that produced this event                      |