refactor: 将 filenamify 移动至本地，将正则表达式设置为 static (#156)

Cargo.lock

@@ -430,7 +430,6 @@ dependencies = [
  "clap",
  "cookie",
  "dirs",
- "filenamify",
  "float-ord",
  "futures",
  "handlebars",
@@ -953,16 +952,6 @@ version = "2.0.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "658bd65b1cf4c852a3cc96f18a8ce7b5640f6b703f905c7d74532294c2a63984"
 
-[[package]]
-name = "filenamify"
-version = "0.1.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "da9be5c5c7738f71d690d14e021cc0bd91888b07b015c5c95df22463e78ca09e"
-dependencies = [
- "lazy_static",
- "regex",
-]
-
 [[package]]
 name = "finl_unicode"
 version = "1.2.0"