bug fixed: v0.4.0a1 preview (#8)

* accelerate initiation

* add subcommand: scan

* update scan report html

* update scan and add trackplot

* reorganzie _report_utils

* fix bug

* update scan, integrate, generator

* update trackplot: fixed arrow head length

* add pl.logo() pl.waterfall(), update anno function

* sync API docs for pp/pl/tl and fix pyproject.toml dependencies

* split scan/anno downstream analysis function

* update vp.anno.pl.waterfall() and vp.anno.pl.logo()

* update documents

* fixed scan, anno function; update heatmap, align, haplotype function

* release: v0.4.0a1 preview

- Update pyproject.toml: bump version to 0.4.0a1, remove unused deps
  (Levenshtein, rich, logomaker), add min version constraints
- Update vampire.def: sync version label, add conda mirror support
  (Tsinghua TUNA for CN users), remove R packages
- Fix polars 1.x compatibility: add return_dtype to map_elements calls
- Update docs: installation --pre note, CLI reference (integrate/evaluate/
  refine/identity), news entry for 0.4.0a1 preview

* fixed bug: add __init__.py

* Merge pull request #6 from Zikun-Yang/dev (#7)

release: v0.4.0a1 preview

Author: Zikun-Yang