feat: less strict agentskills module attribute requirements (#450)

Signed-off-by: András Jáky <ajaky@cisco.com>

Author: akijakya

schema/objects/agentskills_data.json

@@ -8,13 +8,13 @@
       "reference": "agentskills_manifest",
       "caption": "Skill Manifest",
       "description": "Structured SKILL.md metadata extracted from the skill package.",
-      "requirement": "required"
+      "requirement": "recommended"
     },
     "source_locator": {
       "reference": "agentskills_source_locator",
       "caption": "Source Locator",
       "description": "Location of the Agent Skills package (repository, registry, or local artifact).",
-      "requirement": "required"
+      "requirement": "optional"
     },
     "source_revision": {
       "reference": "agentskills_source_revision",
@@ -26,7 +26,7 @@
       "reference": "agentskills_skill_file",
       "caption": "Skill File",
       "description": "Path to the skill definition file, typically SKILL.md.",
-      "requirement": "required"
+      "requirement": "optional"
     },
     "capabilities": {
       "reference": "agentskills_capabilities",
@@ -44,7 +44,7 @@
       "reference": "agentskills_validation",
       "caption": "Validation",
       "description": "Validation results for SKILL.md and referenced artifacts against the Agent Skills standard.",
-      "requirement": "required"
+      "requirement": "optional"
     },
     "standard_version": {
       "reference": "agentskills_standard_version",