⬆️ version bump to v4.5

- Update obioptions.Version from "Release 4.4.29" to "/v/ Release v5"
- Update version.txt from 4.29 → .30
(automated by Makefile)

autodoc/docmd/pkg/obifp/unint.md

@@ -0,0 +1,32 @@
+# Obifp Package: Generic Fixed-Point Unsigned Integer Operations
+
+This Go package (`obifp`) provides a generic, type-safe interface for fixed-point unsigned integer arithmetic over three size variants: `Uint64`, `Uint128`, and `Uint256`.
+
+## Core Interface: `FPUint[T]`
+
+The interface defines a unified API for unsigned integer types, supporting:
+
+- **Initialization & Conversion**:  
+  - `Zero()`, `Set64(v)`: Create zero or set from a `uint64`.  
+  - `AsUint64()`: Downcast to standard `uint64`.
+
+- **Logical Operations**:  
+  - Bitwise: `And`, `Or`, `Xor`, `Not`.  
+  - Shifts: `LeftShift(n)`, `RightShift(n)`.
+
+- **Arithmetic**:  
+  - Addition (`Add`), subtraction (`Sub`), multiplication (`Mul`). Division is commented out—likely reserved for future implementation.
+
+- **Comparison**:  
+  - Full ordering: `<`, `<=`, `>`, `>=`.
+
+- **Utility Predicates**:  
+  - `IsZero()` for zero-checking.
+
+## Helper Functions
+
+- `ZeroUint[T]`: Returns the neutral element (zero) for type `T`.  
+- `OneUint[T]`: Constructs value 1 via `Set64(1)`.  
+- `From64[T]`: Converts a standard Go `uint64` into the generic type.
+
+All operations are **method-chaining friendly** (return `T`, not pointers), enabling fluent syntax. The design promotes correctness and performance in cryptographic or financial contexts where large, fixed-size integers are required.