refactor: rename plugin features with type prefix for consistency

- Plugin features now use type_ prefix (meta_magic, filter_grep, etc.)
- Added meta_all_musl and filter_all_musl for MUSL-compatible builds
- grep filter plugin made optional via filter_grep feature flag
- Removed regex crate from grep-related code, uses strip_prefix instead
- Updated CHANGELOG.md with breaking change documentation

Cargo.toml

@@ -46,7 +46,7 @@ tree_magic_mini = { version = "3.2", optional = true }
 nix = { version = "0.30", features = ["fs", "process"] }
 comfy-table = "7.2"
 pwhash = "1.0"
-regex = "1.10"
+regex = { version = "1.10", optional = true }
 ringbuf = "0.4"
 rusqlite = { version = "0.37", features = ["bundled", "array", "chrono"] }
 rusqlite_migration = "2.3"
@@ -85,14 +85,15 @@ tiktoken-rs = { version = "0.9", optional = true }
 tempfile = "3.3"
 
 [features]
-# Default features include core compression engines and swagger UI
+# Default features include core compression engines plugins that support MUSL
 default = [
         "client",
         "gzip",
-        "infer",
+        "filter_grep",
+        "meta_infer",
         "lz4",
-        "tokens",
-        "tree_magic_mini",
+        "meta_tokens",
+        "meta_tree_magic_mini",
         "zstd"
 ]
 
@@ -106,14 +107,18 @@ bzip2 = []
 xz = []
 zstd = ["dep:zstd"]
 
-# Plugin features (meta and filter)
-all-meta-plugins = ["dep:magic", "dep:infer", "dep:tree_magic_mini"]
-all-filter-plugins = []
+# Meta plugin features
+meta_magic = ["dep:magic"]
+meta_infer = ["dep:infer"]
+meta_tree_magic_mini = ["dep:tree_magic_mini"]
+meta_tokens = ["dep:tiktoken-rs"]
+meta_all = ["meta_magic", "meta_infer", "meta_tree_magic_mini", "meta_tokens"]
+meta_all_musl = ["meta_infer", "meta_tree_magic_mini", "meta_tokens"]
 
-# Individual plugin features
-magic = ["dep:magic"]
-infer = ["dep:infer"]
-tree_magic_mini = ["dep:tree_magic_mini"]
+# Filter plugin features
+filter_grep = ["dep:regex"]
+filter_all = ["filter_grep"]
+filter_all_musl = ["filter_grep"]
 
 # Swagger UI feature
 swagger = ["dep:utoipa-swagger-ui"]
@@ -121,8 +126,5 @@ swagger = ["dep:utoipa-swagger-ui"]
 # Client feature (HTTP client for remote server)
 client = ["dep:ureq", "dep:os_pipe"]
 
-# Token counting feature (LLM token support via tiktoken)
-tokens = ["dep:tiktoken-rs"]
-
 [dev-dependencies]
 rand = "0.9"