feat: add WD tagger with CSV tag support and model download via ureq/zip

Introduces tagger.rs for WD-based image tagging with CSV label support.
Adds csv, ureq, and zip dependencies; updates gitignore to exclude Python/JSON files.

src-tauri/Cargo.lock

@@ -874,6 +874,27 @@ dependencies = [
  "syn 2.0.117",
 ]
 
+[[package]]
+name = "csv"
+version = "1.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "52cd9d68cf7efc6ddfaaee42e7288d3a99d613d4b50f76ce9827ae0c6e14f938"
+dependencies = [
+ "csv-core",
+ "itoa",
+ "ryu",
+ "serde_core",
+]
+
+[[package]]
+name = "csv-core"
+version = "0.1.13"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "704a3c26996a80471189265814dbc2c257598b96b8a7feae2d31ace646bb9782"
+dependencies = [
+ "memchr",
+]
+
 [[package]]
 name = "ctor"
 version = "0.2.9"
@@ -4009,6 +4030,7 @@ dependencies = [
  "candle-nn",
  "candle-transformers",
  "chrono",
+ "csv",
  "fast_image_resize",
  "ffmpeg-sidecar",
  "hf-hub",
@@ -4030,9 +4052,11 @@ dependencies = [
  "tauri-plugin-opener",
  "tokenizers",
  "tokio",
+ "ureq",
  "uuid",
  "walkdir",
  "xxhash-rust",
+ "zip 4.6.1",
 ]
 
 [[package]]