fix signature regex

update php dependencies

fix some style issues

When first visiting the home page, users would see an error message that was normal because Castopod
Host wasn't installed yet. From now on, the error is caught to redirect users directly to install
page, preventing them seeing the error and thus, resulting in a better user experience.

- update .devcontainer settings: remove auto-formatting
for php + set intelephense as default formatter
- remove prettier php plugin as it lacks php 8 support
- add captain hook action for checking style pre-commit
- fix style with ecs on all files except views

- move and refactor Image.php from Libraries to Entities folder
- update some database field names
/ types
- update composer packages

- update CI process to include quality stage (tests + code review)
- add captainhook to install git pre-commit & pre-push hooks
- remove .devcontainer Dockerfile to use project's docker-compose services: all
services can now be started automatically using vscode
- update docs/setup-development.md

- add "ActivityPub" library to handle server to server federation and basic
  client to server protocols using activitypub:
  - add webfinger endpoint to look for actor
  - add actor definition with inbox / outbox / followers
  - remote follow an actor
  - create notes with possible preview cards
  - interract with favourites, reblogs and replies
  - block incoming actors and/or domains
  - broadcast/schedule activities to fediverse followers using a cron task
- For castopod, the podcast is the actor:
  - overwrite the activitypub library for castopod's specific needs
  - perform basic interactions administrating a podcast to interact with fediverse users:
    - create notes with episode attachment
    - favourite and share a note + reply
    - add specific castopod_namespaces for podcasts and episodes definitions
- overwrite CodeIgniter's Route service to include alternate-content option for
  activitystream requests
- update episode publication logic:
  - remove publication inputs in create / edit episode form
  - publish / schedule or unpublish an episode after creation
  - the podcaster publishes a note when publishing an episode
- Javascript / Typescript modules:
  - fix Dropdown.ts to keep dropdown menu in foreground
  - add Modal.ts for funding links modal
  - add Toggler.ts to toggle various css states in ui
- User Interface:
  - update tailwindcss to v2
  - use castopod's pine and rose colors
  - update public layout to a 3 column layout
  - add pages in public for podcast activity, episode list and notes
  - update episode page to include linked notes
  - remove previous and next episodes from episode pages
  - show different public views depending on whether user is authenticated or not
  - use Kumbh Sans and Montserrat fonts
- update CodeIgniter's config files
- with CodeIgniter's new requirements, update docker environments are now based on
  php v7.3 image
- move Image entity to Libraries
- update composer and npm packages to latest versions

closes #69 #65 #85, fixes #51 #91 #92 #88

- add .editorconfig file
- format all files to comply with castopod's coding style
- switch parsedown dependency with commonmark library to better follow commonmark spec for markdown
- add prettier command to format all project files at once

closes #16

- overwrite myth/auth config with castopod app needs
- create custom views for users authentication
- add admin area bootstrapped by admin controller
- shift podcast and episodes crud to admin area
- reorganize view layouts
- update docs for database migration
- add myth-auth to DEPENDENCIES.md

closes #11

- refactor episode, podcast and category entities to add dynamic properties
- refactor Routes when adding feed route
- update migration files to better fit itunes' and rss' specs
- update podcast and episode forms
- add SimpleRSSElement class to Libraries
- add rss_helper
- update home controller to redirect if system has only one podcast

- 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

- add node service in docker-compose.yml
- update .devcontainer Dockerfile by adding node, npm and vim
- init package.json for npm with tailwindcss, postcss, commitlint and commitizen as dev dependencies
- update default layout main header and footer
- replace CI's welcome_message.php with home.php listing all podcasts
- add AUTHORS.md file
- add docs folder in which to place castopod's technical documentation