add: KSC section extraction

Cargo.toml

@@ -7,4 +7,6 @@ edition = "2021"
 
 [dependencies]
 anyhow = "1.0.79"
-byteorder = "1.5.0"
+byteorder = "1.5.0"
+clap = { version = "4.5.0", features = ["env", "derive"] }
+zstd = "0.13"

README.md

@@ -9,7 +9,7 @@ Tools for working with the kfc_data/kfc_dir files for Enshrouded modding.
 Run the extractor with the following arguments:
 
 ```bash
-kfc-tools.exe {path to enshrouded.kfc_dir} {path to enshrouded.kfc_data}
+kfc-tools.exe extract-kfc {path to enshrouded.kfc_dir} {path to enshrouded.kfc_data}
 ```
 
 Output notes:

src/kfc.rs

@@ -4,19 +4,19 @@ use std::io::{Read, SeekFrom};
 
 #[derive(Debug)]
 #[allow(unused)]
-pub struct KFCDirHeader {
+pub struct KFCDirFileHeader {
     pub magic: u32,
     pub count: u32,
     pub count2: u32,
     pub field_0xc: u32,
     pub data_file_size: u64,
 }
 
-fn read_kfc_dir_header<T>(rdr: &mut T) -> Result<KFCDirHeader>
+fn read_kfc_file_header<T>(rdr: &mut T) -> Result<KFCDirFileHeader>
 where
     T: Read + std::io::Seek,
 {
-    let header = KFCDirHeader {
+    let header = KFCDirFileHeader {
         magic: rdr.read_u32::<LittleEndian>()?,
         count: rdr.read_u32::<LittleEndian>()?,
         count2: rdr.read_u32::<LittleEndian>()?,
@@ -52,22 +52,22 @@ where
 
 #[derive(Debug)]
 #[allow(unused)]
-pub struct KFCDir {
+pub struct KFCDirFile {
     pub _offset: u64,
-    pub header: KFCDirHeader,
+    pub header: KFCDirFileHeader,
     pub _data_start: u64,
 
     pub hash_table: Vec<u64>,
     pub size_table: Vec<KFCSizeEntry>,
     pub offset_table: Vec<u64>,
 }
 
-pub fn read_kfc_dir<T>(rdr: &mut T) -> Result<KFCDir>
+pub fn read_kfc_dir_file<T>(rdr: &mut T) -> Result<KFCDirFile>
 where
     T: Read + ReadBytesExt + std::io::Seek,
 {
     let _offset = rdr.stream_position()?;
-    let header = read_kfc_dir_header(rdr)?;
+    let header = read_kfc_file_header(rdr)?;
     let _data_start = rdr.stream_position()?;
 
     // I've never seen a case where these are different, but the offset table
@@ -98,7 +98,7 @@ where
         offset_table.push(entry);
     }
 
-    Ok(KFCDir {
+    Ok(KFCDirFile {
         _offset,
         header,
         _data_start,