feat(episodes): add create form and view pages for episode

- add james-heinrich/getid3 library as a dependency to composer.json
- update DEPENDENCIES.md file
- fix episodes table migration script
- add js devDependencies: prettier, @prettier/plugin-php and lint-staged to automatically format staged files before commit
- reformat all files to the prettier format
- refactor code by separating some logic as helper functions
- overwrite existing files when uploading new files with the same name

fixes #1

commitlint.config.js

@@ -1 +1 @@
-module.exports = { extends: ['@commitlint/config-conventional'] }
+module.exports = { extends: ["@commitlint/config-conventional"] };