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

.devcontainer/devcontainer.json

@@ -12,7 +12,8 @@
     "streetsidesoftware.code-spell-checker",
     "naumovs.color-highlight",
     "heybourn.headwind",
-    "anish-m.ci-snippets2",
-    "wayou.vscode-todo-highlight"
+    "wayou.vscode-todo-highlight",
+    "esbenp.prettier-vscode",
+    "bradlc.vscode-tailwindcss"
   ]
 }