refactor!: remove legacy parser feature and migrate to picker

The legacy `parser` feature and its module tree (`mingling::parser`,
`Argument`, `Picker`, `Pickable`, etc.) have been fully removed and
replaced by the `picker` feature powered by `arg-picker`.

BREAKING CHANGE: Remove `parser` feature and use `picker` instead.
Migration guide: Replace `features = ["parser"]` with
`features = ["picker"]` and update API usage per the provided table.

4 files changed, 38 insertions, 16 deletions

diff --git a/mingling_core/tests/test-all/Cargo.lock b/mingling_core/tests/test-all/Cargo.lock
index 07bc08e..d239541 100644
--- a/mingling_core/tests/test-all/Cargo.lock
+++ b/mingling_core/tests/test-all/Cargo.lock
@@ -3,6 +3,23 @@
 version = 4
 
 [[package]]
+name = "arg-picker"
+version = "0.2.0"
+dependencies = [
+ "arg-picker-macros",
+ "just_fmt 0.2.0",
+]
+
+[[package]]
+name = "arg-picker-macros"
+version = "0.2.0"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
+[[package]]
 name = "bitflags"
 version = "2.13.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -131,10 +148,10 @@ dependencies = [
 name = "mingling"
 version = "0.5.0"
 dependencies = [
+ "arg-picker",
  "mingling_core",
  "mingling_macros",
  "serde",
- "size",
 ]
 
 [[package]]
@@ -345,12 +362,6 @@ dependencies = [
 ]
 
 [[package]]
-name = "size"
-version = "0.5.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1b6709c7b6754dca1311b3c73e79fcce40dd414c782c66d88e8823030093b02b"
-
-[[package]]
 name = "smallvec"
 version = "1.15.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
diff --git a/mingling_core/tests/test-all/Cargo.toml b/mingling_core/tests/test-all/Cargo.toml
index 272f1d2..df2efdb 100644
--- a/mingling_core/tests/test-all/Cargo.toml
+++ b/mingling_core/tests/test-all/Cargo.toml
@@ -13,7 +13,7 @@ mingling = { path = "../../../mingling", features = [
     "builds",
     "repl",
     "dispatch_tree",
-    "parser",
+    "picker",
     "extras",
 ] }
 tokio = { version = "1", features = ["full"] }
diff --git a/mingling_core/tests/test-structural-renderer/Cargo.lock b/mingling_core/tests/test-structural-renderer/Cargo.lock
index fcf244d..6126fb0 100644
--- a/mingling_core/tests/test-structural-renderer/Cargo.lock
+++ b/mingling_core/tests/test-structural-renderer/Cargo.lock
@@ -3,6 +3,23 @@
 version = 4
 
 [[package]]
+name = "arg-picker"
+version = "0.2.0"
+dependencies = [
+ "arg-picker-macros",
+ "just_fmt",
+]
+
+[[package]]
+name = "arg-picker-macros"
+version = "0.2.0"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
+[[package]]
 name = "bitflags"
 version = "2.13.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -67,10 +84,10 @@ dependencies = [
 name = "mingling"
 version = "0.5.0"
 dependencies = [
+ "arg-picker",
  "mingling_core",
  "mingling_macros",
  "serde",
- "size",
 ]
 
 [[package]]
@@ -215,12 +232,6 @@ dependencies = [
 ]
 
 [[package]]
-name = "size"
-version = "0.5.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1b6709c7b6754dca1311b3c73e79fcce40dd414c782c66d88e8823030093b02b"
-
-[[package]]
 name = "syn"
 version = "2.0.118"
 source = "registry+https://github.com/rust-lang/crates.io-index"
diff --git a/mingling_core/tests/test-structural-renderer/Cargo.toml b/mingling_core/tests/test-structural-renderer/Cargo.toml
index 6ae8fce..a12d426 100644
--- a/mingling_core/tests/test-structural-renderer/Cargo.toml
+++ b/mingling_core/tests/test-structural-renderer/Cargo.toml
@@ -7,5 +7,5 @@ publish = false
 [workspace]
 
 [dependencies]
-mingling = { path = "../../../mingling", features = ["structural_renderer_full", "parser"] }
+mingling = { path = "../../../mingling", features = ["structural_renderer_full", "picker"] }
 serde = { version = "1", features = ["derive"] }