aaa 2.0.0

Swiss Army knife for animated ascii art
# TODO
- [X] playing
    - [X] setting terminal title to art's title line
    - [X] two arts side by side
- conversion
    - [X] ansi frames
    - [X] svg
    - [X] asciicast
    - [X] json
    - [X] durformat
    - [X] ttyrec
    - [X] png
    - [X] gif
    - [X] mp4
    - [X] webp
- editing 
    - [X] set cell
    - colors
        - [X] search or add color mapping
        - [X] remove color mapping
            - replace unmapped color in art with `_`
        - [X] remove whole palette
        - [X] force disable/enable colors
    - frames
        - [X] remove frame
        - [X] dup frame
        - [X] make sure frame exists
        - [X] slice
        - [X] swap two frames
        - [X] reverse frames
        - [X] dedup frames
        - [X] rotate back / forth
    - pinning
        - [X] text
        - [X] colors
    - [X] crop (shift + resize)
    - [X] fill (whole art / single frame)
    - [X] fill area (whole art / single frame)
    - [X] clean (whole art / single frame)
    - [X] print text
    - [X] filters
    - tags
        - [X] add tag
        - [X] remove tag
        - [X] remove all tags
    - delay
        - [X] set global/per-frame delay
        - [X] unset delays to default
    - header
        - [X] set title
        - [X] set authors
        - [X] set orig authors
        - [X] set src
        - [X] set editor
        - [X] set license
        - [X] set loop
        - [X] set preview
- [X] art generation
    - [X] from text
- animation effects
    - [X] integration with from-text 
    - [ ] effect command
    - [X] roller
    - [ ] falling sand
    - [ ] random appear
- [X] fetch
- [X] builtin distros logos
- [X] comments stripping
- [ ] art optimisation
- shell autocompletion
    - [ ] bash
    - [ ] fish
    - [ ] zsh?
    - [ ] nush?
    - [ ] [inshellisense](https://github.com/microsoft/inshellisense)?
    - [ ] [carapace](https://github.com/carapace-sh/carapace)?
    - [ ] [fig](https://github.com/withfig/autocomplete)??
- [X] MIME DB files
- [X] usage examples