⬆️ 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/obiutils/slices.md

@@ -0,0 +1,22 @@
+# `obiutils` Package Overview
+
+The `obiutils` package provides generic, reusable utility functions for common slice operations in Go.
+
+- **`Contains[T comparable](arr []T, x T) bool`**  
+  Checks whether a given element exists in the slice. Uses generic type `T`, requiring only that it supports equality comparison.
+
+- **`LookFor[T comparable](arr []T, x T) int`**  
+  Returns the index of the *first* occurrence of `x`, or `-1` if not found. Also generic over comparable types.
+
+- **`RemoveIndex[T comparable](s []T, index int) []T`**  
+  Removes the element at `index`, returning a new slice. Works in O(1) time (amortized), using `append` to rebuild the slice.
+
+- **`Reverse[S ~[]E, E any](s S, inplace bool) S`**  
+  Reverses the slice elements. If `inplace = true`, modifies the original; otherwise, copies first and returns a reversed copy. Uses type constraint `~[]E` for flexibility across slice aliases.
+
+All functions are designed to be:
+- Type-safe via Go generics (no reflection),
+- Efficient and idiomatic,
+- Well-documented with clear parameter/return semantics.
+
+Ideal for use in data processing, validation logic, or general-purpose slice manipulation.