docs: add creative and security to skill proposal categories

.github/ISSUE_TEMPLATE/01_skill_proposal.yml

@@ -9,6 +9,8 @@ body:
         Thanks for helping expand the Skillware ecosystem!
         Please review the [Contribution Guidelines](https://github.com/ARPAHLS/skillware/blob/main/CONTRIBUTING.md) and start from [templates/python_skill/](https://github.com/ARPAHLS/skillware/tree/main/templates/python_skill).
 
+        See the [Skill categories](https://github.com/ARPAHLS/skillware/blob/main/CONTRIBUTING.md#skill-categories) table for the list of valid categories used in the dropdown below.
+
         To improve an **existing** skill, use the **Skill Upgrade** template instead.
 
   - type: input
@@ -27,13 +29,15 @@ body:
       description: Pick an existing category or propose a new one in the description
       options:
         - compliance
+        - creative
         - data_engineering
         - defi
         - dev_tools
         - finance
         - monitoring
         - office
         - optimization
+        - security
         - wellness
         - "Propose new category (describe below)"
     validations:

.github/labels.json

@@ -9,6 +9,11 @@
         "color": "CCCCF0",
         "description": "Security vulnerabilities, trust model, or constitution updates."
     },
+    {
+        "name": "creative",
+        "color": "F5D0FE",
+        "description": "Creative skills, image, video, audio, or generative content."
+    },
     {
         "name": "packaging",
         "color": "DBD3DC",