refactor: migrate to material symbols icon set

package.json

@@ -32,6 +32,8 @@
     "documentation": "compodoc -p tsconfig.json -d docs",
     "e2e": "ng e2e",
     "licenses": "license-checker --json > src/assets/about/licenses.json && ts-node ./scripts/accumulate-licenses.ts",
+    "minify-icons": "ts-node scripts/minify-icon-font.ts",
+    "check-icons": "ts-node scripts/check-icon-correctness.ts",
     "lint": "ng lint",
     "lint:fix": "eslint --fix -c .eslintrc.json --ignore-path .eslintignore --ext .ts,.html src/",
     "ng": "ng",
@@ -97,6 +99,7 @@
     "jsonpath-plus": "6.0.1",
     "leaflet": "1.8.0",
     "leaflet.markercluster": "1.5.3",
+    "material-symbols": "0.2.8",
     "moment": "2.29.3",
     "ngx-logger": "4.3.3",
     "ngx-markdown": "13.1.0",
@@ -128,6 +131,8 @@
     "@cypress/schematic": "1.7.0",
     "@ionic/angular-toolkit": "6.1.0",
     "@ionic/cli": "6.19.1",
+    "@types/fontkit": "1.8.0",
+    "@types/glob": "7.2.0",
     "@types/jasmine": "4.0.3",
     "@types/jasminewd2": "2.0.10",
     "@types/jsonpath": "0.2.0",
@@ -144,6 +149,8 @@
     "eslint-plugin-jsdoc": "39.3.2",
     "eslint-plugin-prettier": "4.0.0",
     "eslint-plugin-unicorn": "42.0.0",
+    "fontkit": "2.0.2",
+    "glob": "8.0.3",
     "is-docker": "2.2.1",
     "jasmine-core": "4.1.1",
     "jasmine-spec-reporter": "7.0.0",