Refactored get_show_list function to allow for offset and limit props

Limited `SEARCH_QUEUE_STATUS_UPDATED` websocket updates to manual searches
Added de-composited status and quality props to episode object json data
Added V2 API endpoint for episode statuses
Added V2 API endpoint for series search formats
Refactored pausing a show to only pause searches and downloads, shows will now continue to get updates from series providers

added check for 'error' property in responses returned from SiCKRAGE API when accessing series provider endpoints
added check inside `run` method in `ShowTaskForceRemove` class of value returned by `find_show`, if NoneType then exit method by returning NoneType
refactored series provider ID enum to use value as slug

Fixed issues with API v2 post-processing

Merged base handler render_string and render methods into render method
Refactored base handlers for API v1 and v2
Fixed redirect issues for auth handlers

Refactoring coming episodes class code to resolve performance issues
Refactored names of API v2 class endpoints
Moved startup message to appear after web server is started
Fixed launching browser to use a proper IP address when SR is set to listen on all interface's

Added schedule API v2 endpoint

Refactored APIv2BaseHandler to APIBaseHandler
Added API base method to generate swagger.json
Added API v2 schema validation method for requests
Added application API v2 documentation and validation for post-processing endpoint
Added application API v2 documentation and validation for episode manual search endpoint
Added application API v2 documentation and validation for episode rename endpoints
Added application API v2 documentation and validation for series endpoints

Added code to migrate existing config files to new config database
Refactored the term indexer to series provider
Refactored the term indexer_id to series id for tv shows and episode_id for tv episodes
Qualities are now enum classes
Episode statuses are now enum classes
Status / Quality composites are now enum classes
Refactored series provider api to support multiple series providers
Refactored core code to support multiple series providers
Refactored metadata providers config code
Data returned from SR backend to new SR web-ui is json using camelCase naming conventions
Refactored how censored items are generatored and handled for log events
Updated CI script
Fixed seeders / leechers for IPTorrents

Split API endpoints into v1 and v2
Refactored allowed web methods to include PUT, DELETE, and OPTIONS
Refactored allowed web headers to include content-type and authorization
Added new series API v2 endpoints
Refactored TVShow airs_next, airs_prev, episodes_unaired, episodes_snatched, episodes_downloaded, and episodes_special methods
Added new TVShow method epsiodes_total to speed-up main show page load times
Added marshmallow to de-serialize SQLAlchemy data for sending back to UI frontend
Added config API v2 endpoint
Converted statusStrings from UserDict to built-in dict without composite splitting
Added IMDbInfo Schema to output json to frontend
Added API v2 Authorization header handling to connect frontend to backend securely
Added API v2 patch method for updating series data
Added API v2 JSON error handler
Refactored how web async calls are done
Added allowed and preferred qualities props to show object
Added poster and banner props to show object
Added to_json method to both show and episode objects
Refactored show object get_overview function into episode object overview property
Added episode manual search API v2 endpoint
Added series episodes rename API v2 endpoint
Refactored languages API endpoint for TheTVDB API client
Refactored indexerAPI indexers function to return list of indexers
Added file browser API v2 endpoint
Updated requirements.txt to work with Python 3.9.x
SR Auth certs are now grabbed and stored to avoid rate-limit issues
Added series API v2 endpoint to add new shows
Added retrieve series metadata API v2 endpoint
Fixed parsing seeders/leechers for IPTorrents
Updated URL for gktorrents