feat: Add Fichero D11s thermal label printer support with REST API and CLI

- Implemented a new module for the Fichero D11s thermal label printer, including BLE and Classic Bluetooth interfaces.
- Created a REST API using FastAPI to manage printer status, info, and printing tasks (text and images).
- Developed a CLI for direct printer interaction, allowing users to print text and images, check status, and modify settings.
- Added image processing capabilities for converting text and images to the required format for printing.
- Introduced error handling for printer operations and connection management.
- Included a shell script for running the API server with configurable parameters.
- Added English translations for configuration options.
- Created a repository metadata file for project management.

fichero_printer/config.yaml

@@ -0,0 +1,42 @@
+name: "Fichero Printer"
+version: "0.1.0"
+slug: "fichero_printer"
+description: "REST API for the Fichero D11s (AiYin) thermal label printer over Bluetooth"
+url: "https://git.leuschner.dev/Tobias/Fichero"
+
+arch:
+  - aarch64
+  - amd64
+  - armhf
+  - armv7
+  - i386
+
+init: false
+startup: application
+boot: auto
+
+host_network: true
+host_dbus: true
+
+# NET_ADMIN is required for Classic Bluetooth (RFCOMM) raw socket access.
+# BLE uses D-Bus (host_dbus) and does not need this.
+privileged:
+  - NET_ADMIN
+
+options:
+  port: 8765
+  ble_address: ""
+  transport: "ble"
+  channel: 1
+
+schema:
+  port: int
+  ble_address: str?
+  transport: list(ble|classic)
+  channel: int
+
+ports:
+  8765/tcp: 8765
+
+ports_description:
+  8765/tcp: "Fichero Printer REST API"