feat(picker2): complete Picker2 prototype

Picker2 replaces the original Picker1 with a two-phase (tag → pick) +
mask-bitmap architecture, decoupling argument matching from type
conversion via a composable matcher pipeline.

Architecture
- FlagMatcher — boolean flags (--verbose)
- ArgMatcher — single flag+value pairs (--name Alice)
- MultiArgMatcher — multi-value flag groups (--files a.txt b.txt)
- PositionalMatcher — positional arguments, respects `--`
- SingleMatcher — composite for Single-type Pickables

Types
- Flag (Active/Inactive) — semantic bool flag value
- String + 14 numeric types via SinglePickable trait
- Vec<T> — greedy multi-value (all SinglePickable types)
- VecUntil<T> — bounded multi-value via BoundaryCheck trait
- VecUntil<T>, pick_string, pick_numbers, pick_bool, pick_flag

Style system
- UNIX_STYLE (kebab), POWERSHELL_STYLE (Pascal), WINDOWS_STYLE (Pascal)
- naming_case auto-conversion via just_fmt integration
- Style-aware separator (= for Unix, : for PS/Windows)

Infrastructure
- internal_repeat! macro generates PickerPattern1..=32
- SinglePickable blanket impl → Pickable
- MultiPickableWithBoundary trait with greedy/bounded variants
- 151 integration tests
- Docs updated for parser feature

1 files changed, 43 insertions, 1 deletions

diff --git a/mingling_picker/src/lib.rs b/mingling_picker/src/lib.rs
index 3c3251d..afc7aca 100644
--- a/mingling_picker/src/lib.rs
+++ b/mingling_picker/src/lib.rs
@@ -1 +1,43 @@
-pub mod prelude {}
+mod builtin;
+
+mod picker;
+pub use picker::*;
+
+mod pickable;
+pub use pickable::*;
+
+mod arg;
+pub use arg::*;
+
+mod infos;
+pub use infos::*;
+
+pub mod parselib;
+
+pub mod value;
+
+pub mod prelude {
+    pub use crate::IntoPicker;
+}
+
+pub mod macros {
+    pub use mingling_picker_macros::*;
+}
+
+/// Provides the types necessary for implementing the `Pickable` trait
+pub mod pickable_needed {
+    pub use crate::{Pickable, PickerArg, PickerArgAttr, PickerArgResult, TagPhaseContext};
+}
+
+/// Provides the types necessary for implementing the `Matcher` trait
+pub mod matcher_needed {
+    pub use crate::PickerArgInfo;
+    pub use crate::parselib::{MaskedArg, Matcher, ParserStyle};
+}
+
+#[cfg(feature = "mingling_support")]
+mod corebind;
+
+#[allow(unused_imports)]
+#[cfg(feature = "mingling_support")]
+pub use corebind::*;