Add Serde, Strum and From features

Cargo.toml

@@ -14,6 +14,10 @@ documentation = "https://docs.rs/file-format"
 exclude = ["/.github", "/examples", "/fixtures", "/tests", ".gitattributes", ".gitignore"]
 rust-version = "1.60.0"
 
+[dependencies]
+serde = { version = "1", features = ["derive"], default-features = false, optional = true }
+strum = { version = "0.26", features = ["derive"], optional = true }
+
 [features]
 ## Reader features
 reader = [
@@ -40,3 +44,15 @@ reader-sqlite3 = []
 reader-txt = []
 reader-xml = []
 reader-zip = []
+serde = [
+ "dep:serde"
+]
+extended-enums = [
+ "dep:strum"
+]
+from-all = [
+ "from-media-type",
+ "from-extension"
+]
+from-media-type = []
+from-extension = []

README.md

@@ -76,6 +76,19 @@ identification.
 - `reader-xml` - Enables Extensible Markup Language (XML) based file formats detection.
 - `reader-zip` - Enables ZIP-based file formats detection.
 
+### Serde feature
+Serde support is optional and disabled by default. To enable use the feature `serde`.
+
+### Extended enums feature
+To use various additional methods for enums derived by `strum`. To enable use the feature `extended-enums`.
+
+### From features
+
+These features enable the detection of file formats by a specific value like media type or extension.
+- `from-all` - Enables all from features.
+- `from-media-type` - Enables the method `FileFormat::from_media_type` to get possible file formats for a media type.
+- `from-extension` - Enables the method `FileFormat::from_extension` to get possible file formats for an extension.
+
 ## Supported file formats
 
 ### Archive