refactor: update js files to typescript and replace parcel with rollup

- add basic rollup config to bundle minified and browser compatible js
- use babel to transpile
typescript files to js
- add static code checkers: eslint and stylelint
- update package.json
scripts
- update DEPENDENCIES.md file to include rollup and popper
- set html in rss feed
description fields
- update Podcast and Episode entities to add description_html attribute
generated by parsing markdown to html using parsedown

#9

.devcontainer/devcontainer.json

@@ -6,24 +6,22 @@
   "settings": {
     "terminal.integrated.shell.linux": "/bin/bash",
     "editor.formatOnSave": true,
-    "editor.codeActionsOnSave": {
-      "source.organizeImports": true
-    },
     "[php]": {
       "editor.defaultFormatter": "esbenp.prettier-vscode"
     },
     "color-highlight.markerType": "dot-before"
   },
   "extensions": [
-	"mikestead.dotenv",
-	"bmewburn.vscode-intelephense-client",
-	"streetsidesoftware.code-spell-checker",
-	"naumovs.color-highlight",
-	"heybourn.headwind",
-	"wayou.vscode-todo-highlight",
-	"esbenp.prettier-vscode",
-	"bradlc.vscode-tailwindcss",
-	"jamesbirtles.svelte-vscode",
-	"dbaeumer.vscode-eslint"
-]
+    "mikestead.dotenv",
+    "bmewburn.vscode-intelephense-client",
+    "streetsidesoftware.code-spell-checker",
+    "naumovs.color-highlight",
+    "heybourn.headwind",
+    "wayou.vscode-todo-highlight",
+    "esbenp.prettier-vscode",
+    "bradlc.vscode-tailwindcss",
+    "jamesbirtles.svelte-vscode",
+    "dbaeumer.vscode-eslint",
+    "stylelint.vscode-stylelint"
+  ]
 }