Migrate to encase from crevice (#4339)
# Objective
- Unify buffer APIs
- Also see #4272
## Solution
- Replace vendored `crevice` with `encase`
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## Changelog
Changed `StorageBuffer`
Added `DynamicStorageBuffer`
Replaced `UniformVec` with `UniformBuffer`
Replaced `DynamicUniformVec` with `DynamicUniformBuffer`
## Migration Guide
### `StorageBuffer`
removed `set_body()`, `values()`, `values_mut()`, `clear()`, `push()`, `append()`
added `set()`, `get()`, `get_mut()`
### `UniformVec` -> `UniformBuffer`
renamed `uniform_buffer()` to `buffer()`
removed `len()`, `is_empty()`, `capacity()`, `push()`, `reserve()`, `clear()`, `values()`
added `set()`, `get()`
### `DynamicUniformVec` -> `DynamicUniformBuffer`
renamed `uniform_buffer()` to `buffer()`
removed `capacity()`, `reserve()`
Co-authored-by: Carter Anderson <mcanders1@gmail.com>
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