Add README and CHANGELOG

CHANGELOG.md

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+# Changelog
+This file documents all notable changes made to this project since the initial fork.
+
+The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
+and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
+
+## [0.1.0] - 2024-07-31
+
+This is an initial release since the fork.
+
+### Breaking changes
+
+ * The `CAP_LAST_CAP` variable is removed; users need to modify the code to
+   use [LastCap] to get the value. (#6)
+ * The code now requires Go >= 1.20.
+
+### Added
+ * `go.mod` and `go.sum` files. (#2)
+ * New [LastCap] function. (#6)
+ * Basic CI using GHA infra. (#8, #9)
+ * README and CHANGELOG. (#10)
+
+### Fixed
+ * Fixed ambient capabilities error handling in [Apply]. (#3)
+ * Fixed future kernel compatibility. (#1)
+ * Fixed various linter warnings. (#4, #7)
+
+### Changed
+ * Go build tags changed from old-style (`+build`) to new Go 1.17+ style (`go:build`). (#2)
+
+### Removed
+ * Removed support for capabilities v1 and v2. (#1)
+ * Removed init function so programs that use this package start faster. (#6)
+ * Removed `CAP_LAST_CAP` (use [LastCap] instead). (#6)
+
+[Apply]: https://pkg.go.dev/github.com/kolyshkin/capability#Capabilities.Apply
+[LastCap]: https://pkg.go.dev/github.com/kolyshkin/capability#LastCap
+
+<!-- minor releases -->
+[0.1.0]: https://github.com/kolyshkin/capability/compare/42c35b4376354fd5...v0.1.0
+

README.md

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+This is a fork of (apparently no longer maintained)
+https://github.com/syndtr/gocapability package. It provides basic primitives to
+work with [Linux capabilities][capabilities(7)].
+
+[![Go Reference](https://pkg.go.dev/badge/github.com/kolyshkin/capability.svg)](https://pkg.go.dev/github.com/kolyshkin/capability)
+
+## Alternatives
+
+ * https://pkg.go.dev/kernel.org/pub/linux/libs/security/libcap/cap
+
+[capabilities(7)]: https://man7.org/linux/man-pages/man7/capabilities.7.html