feat: 支持弹幕下载 (#58)

* chore: 简单引入字幕模块（WIP）

* feat: 初步支持弹幕下载

* feat: 尝试在维持视频比例的基础上对齐视频高度，通过标记 'static 移除生命周期参数

* chore: 在数据库中记录视频页的宽高和长度

* fix: 修复各种错误，移除无用代码

Cargo.lock

@@ -423,12 +423,15 @@ dependencies = [
  "entity",
  "env_logger",
  "filenamify",
+ "float-ord",
  "futures",
  "handlebars",
  "hex",
  "log",
+ "memchr",
  "migration",
  "once_cell",
+ "prost",
  "quick-xml",
  "rand",
  "regex",
@@ -1001,6 +1004,12 @@ dependencies = [
  "miniz_oxide",
 ]
 
+[[package]]
+name = "float-ord"
+version = "0.3.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8ce81f49ae8a0482e4c55ea62ebbd7e5a686af544c00b9d090bba3ff9be97b3d"
+
 [[package]]
 name = "flume"
 version = "0.11.0"
@@ -1528,6 +1537,15 @@ version = "2.9.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "8f518f335dce6725a761382244631d86cf0ccb2863413590b31338feb467f9c3"
 
+[[package]]
+name = "itertools"
+version = "0.10.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b0fd2260e829bddf4cb6ea802289de2f86d6a7a690192fbe91b3f46e0f2c8473"
+dependencies = [
+ "either",
+]
+
 [[package]]
 name = "itertools"
 version = "0.12.1"
@@ -2149,6 +2167,29 @@ dependencies = [
  "unicode-ident",
 ]
 
+[[package]]
+name = "prost"
+version = "0.12.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d0f5d036824e4761737860779c906171497f6d55681139d8312388f8fe398922"
+dependencies = [
+ "bytes",
+ "prost-derive",
+]
+
+[[package]]
+name = "prost-derive"
+version = "0.12.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "19de2de2a00075bf566bee3bd4db014b11587e84184d3f7a791bc17f1a8e9e48"
+dependencies = [
+ "anyhow",
+ "itertools 0.10.5",
+ "proc-macro2",
+ "quote",
+ "syn 2.0.58",
+]
+
 [[package]]
 name = "psl-types"
 version = "2.0.11"
@@ -2857,7 +2898,7 @@ version = "0.2.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "ce81b7bd7c4493975347ef60d8c7e8b742d4694f4c49f93e0a12ea263938176c"
 dependencies = [
- "itertools",
+ "itertools 0.12.1",
  "nom",
  "unicode_categories",
 ]