feat: Add Quarto extension installer

vscode/.gitignore

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+out
+node_modules
+.vscode-test
+*.vsix

vscode/.vscode/launch.json

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+{
+  // Use IntelliSense to learn about possible attributes.
+  // Hover to view descriptions of existing attributes.
+  // For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
+  "version": "0.2.0",
+  "configurations": [
+    {
+      "name": "Run Extension",
+      "type": "extensionHost",
+      "request": "launch",
+      "args": [
+        "--extensionDevelopmentPath=${workspaceFolder}",
+        "${workspaceFolder}/debug"
+      ],
+      "outFiles": [
+        "${workspaceFolder}/out/**/*.js"
+      ],
+      "preLaunchTask": "${defaultBuildTask}"
+    },
+    {
+      "name": "Extension Tests",
+      "type": "extensionHost",
+      "request": "launch",
+      "args": [
+        "--extensionDevelopmentPath=${workspaceFolder}",
+        "--extensionTestsPath=${workspaceFolder}/out/test/suite/index"
+      ],
+      "outFiles": [
+        "${workspaceFolder}/out/test/**/*.js"
+      ],
+      "preLaunchTask": "${defaultBuildTask}"
+    }
+  ]
+}

vscode/.vscode/tasks.json

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+// See https://go.microsoft.com/fwlink/?LinkId=733558
+// for the documentation about the tasks.json format
+{
+	"version": "2.0.0",
+	"tasks": [
+		{
+			"type": "npm",
+			"script": "watch",
+			"problemMatcher": "$tsc-watch",
+			"isBackground": true,
+			"presentation": {
+				"reveal": "never"
+			},
+			"group": {
+				"kind": "build",
+				"isDefault": true
+			}
+		}
+	]
+}

vscode/LICENSE

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+MIT License
+
+Copyright (c) 2024 Mickaël Canouil
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

vscode/package.json

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+{
+  "name": "quarto-extension-installer",
+  "displayName": "Quarto Extension Installer",
+  "description": "Install Quarto extensions from https://github.com/mcanouil/quarto-extensions",
+  "version": "0.0.1",
+  "publisher": "mcanouil",
+  "author": {
+    "name": "Mickaël CANOUIL"
+  },
+  "license": "MIT",
+  "private": true,
+  "keywords": [
+    "markdown",
+    "pandoc",
+    "quarto"
+  ],
+  "repository": {
+    "type": "git",
+    "url": "https://github.com/mcanouil/quarto-extensions/tree/main/vscode"
+  },
+  "homepage": "https://github.com/mcanouil/quarto-extensions/tree/main/vscode",
+  "bugs": {
+    "url": "https://github.com/mcanouil/quarto-extensions/issues"
+  },
+  "engines": {
+    "vscode": "^1.75.0"
+  },
+  "main": "./out/extension.js",
+  "contributes": {
+    "commands": [
+      {
+        "command": "quartoExtensionInstaller.installExtension",
+        "title": "Quarto: Install Extension(s) from mcanouil/quarto-extensions"
+      }
+    ]
+  },
+  "scripts": {
+    "vscode:prepublish": "npm run compile",
+    "compile": "tsc -p ./",
+    "lint": "eslint",
+    "watch": "tsc -watch -p ./"
+  },
+  "devDependencies": {
+    "@types/node": "^22.8.6",
+    "@types/vscode": "^1.75.0",
+    "typescript": "^5.6.2"
+  }
+}