refactor: update to node 22

refactor: remove deprecated "jetifier"
refactor: base migration to Angular v18
fix: angular warning
refactor: update capacitor to v6
refactor: update ngx-markdown to v18
refactor: update to ionic v8
refactor: remove deprecated @ionic-native/core (replaced by @awesome-cordova-plugins/core)
fix: build
fix: test
feat: temporarily use external node image in ci
feat: update to node 22
refactor: rebase
fix: prettier depencencies
ci: update android commandline tools
fix: prettier package type
ci: let pnpm handle build dependencies
refactor: revert to pnpm 8, angular 17

coverage.mjs

@@ -9,7 +9,7 @@ const args = files.map(it => `${it.split('/', 2)[1]}='${it}'`);
 
 console.log(
   'Collecting coverage...',
-  await promisify(exec)(`cobertura-merge -o ./coverage.xml ${args.join(' ')}`),
+  await promisify(exec)(`merge-cobertura -o ./coverage.xml ${args.join(' ')}`),
 );
 
 const reportFiles = await glob('./*/*/coverage/report-junit.xml');