build: Replace Codelyzer and TSLint with Angular ESLint

Migrate from the deprecated TSLint to Angluar ESLint. Also fix current
linting issues in the code, in particular:

- Use strict equals operators (=== and !==)
- Remove empty lifecycle methods (mostly ngOnInit)
- Output bindings including aliases should not be named as standard dom
  events (submit)
- Async pipe results should not be negated

.github/workflows/build.yml

@@ -34,8 +34,8 @@ jobs:
       - name: Npm install
         run: npm install
 
-      - name: Run tslint
-        run : npx tslint src/**/*.ts
+      - name: Run eslint
+        run : npx ng lint
 
       - name: Run build
         run : npm run build:prod