feat: implement csv subcommand to convert csv to json (#2)

* chore: update .gitattributes, .gitignore, and pre-commit config

* chore: update deny.toml configuration

* feat: implement CSV subcommand for rcli

* refactor: split main.rs into modules for better organization

* feat: enhance CSV processing with output format options

Author: RYGRIT

.gitattributes

@@ -0,0 +1,2 @@
+# 强制所有文件使用 LF 换行符
+* text=auto eol=lf

.gitignore

@@ -1 +1,2 @@
 /target
+/fixtures

.pre-commit-config.yaml

@@ -55,7 +55,7 @@ repos:
       - id: cargo-test
         name: cargo test
         description: unit test for the project
-        entry: bash -c 'cargo nextest run --all-features'
+        entry: bash -c 'cargo nextest run --all-features --no-tests="warn"'
         language: rust
         files: \.rs$
         pass_filenames: false