0.3.0: .archify files are YAML and open straight into the diagram

- .archify content is YAML (JSON still accepted); converted to JSON for the renderer
- Archify Diagram custom editor is the default for *.archify; Show Source opens the YAML beside it
- YAML syntax errors and validation problems mapped to YAML lines
- yamlValidation for schema completion with redhat.vscode-yaml
- scripts/to-yaml.mjs converts existing .archify files

package-lock.json

@@ -8,6 +8,9 @@
       "name": "archify-vscode-ext",
       "version": "0.2.0",
       "license": "MIT",
+      "dependencies": {
+        "yaml": "^2.9.1"
+      },
       "devDependencies": {
         "@types/node": "^22.0.0",
         "@types/vscode": "~1.100.0",
@@ -4684,6 +4687,21 @@
       "dev": true,
       "license": "ISC"
     },
+    "node_modules/yaml": {
+      "version": "2.9.1",
+      "resolved": "https://registry.npmjs.org/yaml/-/yaml-2.9.1.tgz",
+      "integrity": "sha512-3NxN8+78OdzbT7C/WjGsyfPAtJaN3FNDsWxv7Y7mcDsT/oOmgW8BpyQQFFBnvZE3j9Y2Sdz1ULFLezL7Eb2yFw==",
+      "license": "ISC",
+      "bin": {
+        "yaml": "bin.mjs"
+      },
+      "engines": {
+        "node": ">= 14.6"
+      },
+      "funding": {
+        "url": "https://github.com/sponsors/eemeli"
+      }
+    },
     "node_modules/yauzl": {
       "version": "3.4.0",
       "resolved": "https://registry.npmjs.org/yauzl/-/yauzl-3.4.0.tgz",