v1.3.4 Improve Archive Command and update UnityFileSystemAPI (#62)

Adds new archive inspection subcommands, self-contained archive metadata parsing, JSON output support, and C# wrappers for recently added UnityFileSystemApi functions.

New archive subcommands: info, header, blocks
Improved archive list with offsets
Archive command supports JSON output via -f Json.
archive extract supports --filter option

Self-contained archive metadata parsing

Extracted all WebBundle-specific code from Archive.cs into a dedicated WebBundleHelper class.

Update to UnityFileSystemApi C# wrappers
Added P/Invoke declarations and public wrappers for 7 new native API functions
(this is exposes TypeTree info that may be used in future PRs)

Author: SkowronskiAndrew

Documentation/command-archive.md

@@ -6,25 +6,112 @@ The `archive` command provides utilities for working with Unity Archives (AssetB
 
 | Sub-Command | Description |
 |-------------|-------------|
+| [`info`](#info) | Display a high-level summary |
+| [`header`](#header) | Display archive header information |
+| [`blocks`](#blocks) | Display the data block list |
 | [`list`](#list) | List contents of an archive |
 | [`extract`](#extract) | Extract contents of an archive |
 
 ---
 
+## info
+
+Displays a high-level summary of a Unity Archive file, including compression ratio, file counts, and data sizes.
+
+### Quick Reference
+
+```
+UnityDataTool archive info <archive-path> [options]
+```
+
+| Option | Description | Default |
+|--------|-------------|---------|
+| `<archive-path>` | Path to the archive file | *(required)* |
+| `-f, --format <Text\|Json>` | Output format | `Text` |
+
+### Example
+
+```bash
+UnityDataTool archive info scenes.bundle
+UnityDataTool archive info scenes.bundle -f Json
+```
+
+---
+
+## header
+
+Displays the header information of a Unity Archive file, including format version, Unity version, file size, metadata compression, and archive flags.
+
+Very old versions of the Unity Archive format are not supported.  But the files created by all currently supported Unity versions should be compatible (and it was tested with files as old as Unity 2017).
+
+### Quick Reference
+
+```
+UnityDataTool archive header <archive-path> [options]
+```
+
+| Option | Description | Default |
+|--------|-------------|---------|
+| `<archive-path>` | Path to the archive file | *(required)* |
+| `-f, --format <Text\|Json>` | Output format | `Text` |
+
+### Example
+
+```bash
+UnityDataTool archive header scenes.bundle
+UnityDataTool archive header scenes.bundle -f Json
+```
+
+---
+
+## blocks
+
+Displays the data block list of a Unity Archive file, showing the size, compression type, and file offset of each block. 
+
+Very old versions of the Unity Archive format are not supported.
+
+### Quick Reference
+
+```
+UnityDataTool archive blocks <archive-path> [options]
+```
+
+| Option | Description | Default |
+|--------|-------------|---------|
+| `<archive-path>` | Path to the archive file | *(required)* |
+| `-f, --format <Text\|Json>` | Output format | `Text` |
+
+### Example
+
+```bash
+UnityDataTool archive blocks scenes.bundle
+UnityDataTool archive blocks scenes.bundle -f Json
+```
+
+---
+
 ## list
 
-Lists the SerializedFiles contained within an archive.
+Lists the contents of an archive, including the offset, size, and flags of each file.
+
+Very old versions of the Unity Archive format are not supported.
 
 ### Quick Reference
 
 ```
-UnityDataTool archive list <archive-path>
+UnityDataTool archive list <archive-path> [options]
 ```
 
+| Option | Description | Default |
+|--------|-------------|---------|
+| `<archive-path>` | Path to the archive file | *(required)* |
+| `-f, --format <Text\|Json>` | Output format | `Text` |
+
 ### Example
 
 ```bash
 UnityDataTool archive list scenes.bundle
+UnityDataTool archive list scenes.bundle -f Json
 ```
 
 ---
@@ -43,11 +130,13 @@ UnityDataTool archive extract <archive-path> [options]
 |--------|-------------|---------|
 | `<archive-path>` | Path to the archive file | *(required)* |
 | `-o, --output-path <path>` | Output directory | `archive` |
+| `--filter <text>` | Case-insensitive substring filter on file paths inside the archive | *(none — extract all)* |
 
 ### Example
 
 ```bash
 UnityDataTool archive extract scenes.bundle -o contents
+UnityDataTool archive extract scenes.bundle --filter sharedAssets
 ```
 
 **Output files:**
@@ -58,7 +147,7 @@ contents/BuildPlayer-Scene2.sharedAssets
 contents/BuildPlayer-Scene2
 ```
 
-> **Note:** The extracted files are binary SerializedFiles, not text. Use the [`dump`](command-dump.md) command to convert them to readable text format.
+> **Note:** The extracted files are in binary formats, not text.  If they are SerializedFiles then use the [`dump`](command-dump.md) command to convert them to readable text format.  See also the [`serialized-file`](command-serialized-file.md) command.
 
 ---
 

TestCommon/Data/PlayerDataCompressed/README.md

@@ -0,0 +1,5 @@
+This is an example of the format used for Player Data when compression is enabled.  
+
+It is a Unity Archive and can be examined with the "archive" command.  It was created with Unity 2021.3.20f1.
+This was built without TypeTrees enabled, so the analyze command is not able to extract information.
+