Manim v0.22.0 发布

See [our rendered changelog](https://docs.manim.community/en/stable/changelog/0.22.0-changelog.html).

## Highlights 🌟

### Unified output selection and configurable video encoding

Choosing what Manim produces has been reworked around a single `format`

setting. `--format` (or `format` in the `[CLI]` section of a config file)

selects exactly one primary artifact: `auto` (the default; MP4, or MOV for

transparent output), `mp4`, `mov`, `webm`, `gif`, `png` (last frame only),

`png-sequence` (every frame), or `none` (evaluate the scene without writing

media). It replaces the overlapping `--write_to_movie`, `-g`/`--save_pngs`,

`-i`/`--save_as_gif`, and `--force_window` options. Viewing the result is now

separate from choosing what to write: `-p`/`--preview` opens the finished file

with either renderer, while `-l`/`--live-preview` shows a live window (OpenGL).

As a consequence, the OpenGL renderer now writes files by default, just like

Cairo. The `--custom_folders` preset has been removed in favor of setting

each output location separately. (https://github.com/manimcommunity/manim/pull/4966, https://github.com/manimcommunity/manim/pull/4969)

Video encoding is now configurable, too: the new `[video_encoder]` config

section and the `--video-codec`, `--pixel-format`, and repeatable

`--encoder-option KEY=VALUE` options control how partial movie files are

encoded, for example

`manim render --video-codec libx264 --encoder-option crf=18 --encoder-option preset=slow scene.py`.

The new `manim cache clear` command replaces the `--flush_cache` flag. (https://github.com/manimcommunity/manim/pull/4976)

Scenes rendered with default settings need no changes, but scripts and config

files relying on the removed options have to be updated. See the migration

notes in the Breaking Changes section below.

Comprehensive documentation for the updated configuration system

can be found in the

[configuration guide](https://docs.manim.community/en/stable/guides/configuration.html) and the

[output settings tutorial](https://docs.manim.community/en/stable/tutorials/output_and_config.html).

### A `Manager` for coordinating the render flow

This release takes a first step towards a full overhaul of Manim's

render lifecycle by introducing a `Manager` object that coordinates

the processing of a `Scene`. Regular scenes (i.e., those without

custom cameras, renderers, or file writers) do

not need any changes.

Until now, the responsibilities of the ren