Add contribution instructions to readme

.github/workflows/hacs_check.yml

@@ -14,4 +14,4 @@ jobs:
       - name: HACS Action
         uses: "hacs/action@main"
         with:
-          category: "integration"
+          category: "integration"

.github/workflows/validate.yml

@@ -11,4 +11,4 @@ jobs:
     runs-on: "ubuntu-latest"
     steps:
         - uses: "actions/checkout@v3"
-        - uses: "home-assistant/actions/hassfest@master"
+        - uses: "home-assistant/actions/hassfest@master"

README.md

@@ -1,5 +1,7 @@
 # Haier hOn
-Home Assistant component supporting hOn cloud.
+[![hacs_badge](https://img.shields.io/badge/HACS-Custom-41BDF5.svg)](https://github.com/hacs/integration)
+
+Home Assistant component supporting devices of Haier's mobile app **hOn**.
 
 ## Installation
 #### Installing via HACS
@@ -14,6 +16,51 @@ Home Assistant component supporting hOn cloud.
 9. Search for Haier hOn 
 10. Type your username used in the hOn App and hit submit
 
+## Contribute
+Any kind of contribution is welcome!
+#### Add appliances or additional attributes
+1. Install [pyhOn](https://github.com/Andre0512/pyhOn)
+   ```commandline
+    $ pip install pyhOn
+    ```
+2. Use the commandline tool to read out all appliance data from your account
+    ```commandline
+    $ pyhOn
+    User for hOn account: user.name@example.com
+    Password for hOn account: ********
+    ========== WM - Washing Machine ==========
+    commands:
+      pauseProgram: pauseProgram command
+      resumeProgram: resumeProgram command
+      startProgram: startProgram command
+      stopProgram: stopProgram command
+    data:
+      actualWeight: 0
+      airWashTempLevel: 0
+      airWashTime: 0
+      antiAllergyStatus: 0
+      ...
+    ```
+3. Fork this repository and clone it to your local machine
+4. Add the keys of the attributes you'd like to have as `EntityDescription` into this Repository  
+   _Example: Add pause button_
+    ```python
+    BUTTONS: dict[str, tuple[ButtonEntityDescription, ...]] = {
+        "WM": (                        # WM is the applianceTypeName
+            ButtonEntityDescription(
+                key="pauseProgram",    # key from pyhOn
+                name="Pause Program",  # name in home assistant
+                icon="mdi:pause",      # icon in home assistant
+                ...
+            ),
+        ...
+    ```
+5. Create a [pull request](https://github.com/Andre0512/hon/pulls)
+
+#### Tips and Tricks
+- If you want to have some states humanreadable, have a look at the `translation_key` parameter of the `EntityDescription`
+- If you need to implement some more logic, create a pull request to the underlying library. There we collect special requirements in the `appliances` directory.
+
 ## Supported Appliances
 - Washing Machine