feat: add IETF RFC search extension

package.json

@@ -0,0 +1,38 @@
+{
+	"$schema": "https://raw.githubusercontent.com/vicinaehq/vicinae/refs/heads/main/extra/schemas/extension.json",
+	"name": "vicinae-extension-ietf-rfc",
+	"title": "IETF RFC Search",
+	"description": "Search and inspect the complete RFC Editor index",
+	"categories": [],
+	"license": "MIT",
+	"author": "yuta",
+	"contributors": [],
+	"pastContributors": [],
+	"icon": "extension_icon-v2.png",
+	"commands": [
+		{
+			"name": "search-rfc",
+			"title": "Search IETF RFCs",
+			"description": "Search RFCs by number, title, author, keyword, or abstract",
+			"mode": "view"
+		}
+	],
+	"preferences": [],
+	"scripts": {
+		"build": "vici build",
+		"dev": "vici develop",
+		"format": "biome format --write src",
+		"lint": "biome check src && vici lint",
+		"test": "vitest run",
+		"check": "npm run lint && npm run test && npm run build"
+	},
+	"dependencies": {
+		"@vicinae/api": "^0.23.2",
+		"fast-xml-parser": "^5.10.1"
+	},
+	"devDependencies": {
+		"@biomejs/biome": "2.3.2",
+		"typescript": "^5.9.2",
+		"vitest": "^4.1.10"
+	}
+}