fix: remove ./ prefix from plugin skill paths

Claude Code plugin validator rejects bare ./ prefixes as escaping
the plugin directory. Strips ./ from all skill paths and source field
so the plugin loads correctly.

Closes #243

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

.claude-plugin/marketplace.json

@@ -13,45 +13,45 @@
     {
       "name": "marketing-skills",
       "description": "36 marketing skills for technical marketers and founders: ASO, CRO, copywriting, cold email, SEO, AI SEO, paid ads, ad creative, churn prevention, pricing strategy, referral programs, revenue operations, sales enablement, customer research, site architecture, and more",
-      "source": "./",
+      "source": ".",
       "strict": false,
       "skills": [
-        "./skills/ab-test-setup",
+        "skills/ab-test-setup",
-        "./skills/ad-creative",
+        "skills/ad-creative",
-        "./skills/ai-seo",
+        "skills/ai-seo",
-        "./skills/analytics-tracking",
+        "skills/analytics-tracking",
-        "./skills/aso-audit",
+        "skills/aso-audit",
-        "./skills/churn-prevention",
+        "skills/churn-prevention",
-        "./skills/cold-email",
+        "skills/cold-email",
-        "./skills/community-marketing",
+        "skills/community-marketing",
-        "./skills/competitor-alternatives",
+        "skills/competitor-alternatives",
-        "./skills/content-strategy",
+        "skills/content-strategy",
-        "./skills/copy-editing",
+        "skills/copy-editing",
-        "./skills/copywriting",
+        "skills/copywriting",
-        "./skills/customer-research",
+        "skills/customer-research",
-        "./skills/email-sequence",
+        "skills/email-sequence",
-        "./skills/form-cro",
+        "skills/form-cro",
-        "./skills/free-tool-strategy",
+        "skills/free-tool-strategy",
-        "./skills/launch-strategy",
+        "skills/launch-strategy",
-        "./skills/lead-magnets",
+        "skills/lead-magnets",
-        "./skills/marketing-ideas",
+        "skills/marketing-ideas",
-        "./skills/marketing-psychology",
+        "skills/marketing-psychology",
-        "./skills/onboarding-cro",
+        "skills/onboarding-cro",
-        "./skills/page-cro",
+        "skills/page-cro",
-        "./skills/paid-ads",
+        "skills/paid-ads",
-        "./skills/paywall-upgrade-cro",
+        "skills/paywall-upgrade-cro",
-        "./skills/popup-cro",
+        "skills/popup-cro",
-        "./skills/pricing-strategy",
+        "skills/pricing-strategy",
-        "./skills/product-marketing-context",
+        "skills/product-marketing-context",
-        "./skills/programmatic-seo",
+        "skills/programmatic-seo",
-        "./skills/referral-program",
+        "skills/referral-program",
-        "./skills/revops",
+        "skills/revops",
-        "./skills/sales-enablement",
+        "skills/sales-enablement",
-        "./skills/schema-markup",
+        "skills/schema-markup",
-        "./skills/seo-audit",
+        "skills/seo-audit",
-        "./skills/signup-flow-cro",
+        "skills/signup-flow-cro",
-        "./skills/site-architecture",
+        "skills/site-architecture",
-        "./skills/social-content"
+        "skills/social-content"
       ]
     }
   ]