Add CHANGELOG.md to document notable project changes

Author: decioferreira

CHANGELOG.md

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+# Changelog
+
+All notable changes to this project will be documented in this file.
+
+The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/),
+and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
+
+## [Unreleased]
+
+### Added
+
+- WIP: Allow running the `make` command in the browser ([#94](https://github.com/guida-lang/compiler/issues/94))
+- Initial REPL tests for basic arithmetic evaluation
+- New `test` command ([#98](https://github.com/guida-lang/compiler/issues/98))
+- Add `elm-explorations/test` dependency as part of `init` ([#65](https://github.com/guida-lang/compiler/issues/65))
+- Extend record referred by another record’s field ([#79](https://github.com/guida-lang/compiler/issues/79))
+- Add a `CONTRIBUTING.md` file ([#103](https://github.com/guida-lang/compiler/issues/103))
+- `guida format` command ([#100](https://github.com/guida-lang/compiler/issues/100))
+- Numeric separators ([#109](https://github.com/guida-lang/compiler/issues/109))
+- Binary literals support ([#2248](https://github.com/elm/compiler/issues/2248))
+- Bool type support in WebGL shader interface ([#2120](https://github.com/elm/compiler/issues/2120)).
+
+### Fixed
+
+- Correct reporting of multiple errors ([#99](https://github.com/guida-lang/compiler/issues/99))
+- Replaced infinite looping `Crash.crash` with log and exit ([#120](https://github.com/guida-lang/compiler/issues/120))
+
+### Changed
+
+- Refactored project structure to support both Node and Browser environments
+- Refactoring of `Task` aliases for a more unified approach across the codebase ([#108](https://github.com/guida-lang/compiler/issues/108))
+
+---
+
+## [1.0.0-alpha] – 2025-03-28
+
+### Added
+
+- Initial stable release.
+- Allow tuples with 3+ elements ([#75](https://github.com/guida-lang/compiler/issues/75).
+- Support for `GUIDA_REGISTRY` environment variable.
+- New `--yes` flag for `init` command ([#80](https://github.com/guida-lang/compiler/issues/80)).
+* Support modifying records via qualified names ([#78](https://github.com/guida-lang/compiler/issues/78)).
+- New `--package` flag for `init` command ([#43](https://github.com/guida-lang/compiler/issues/43)).
+- New `--test` flag for `install` command ([#64](https://github.com/guida-lang/compiler/issues/64)).
+- `uninstall` command ([#60](https://github.com/guida-lang/compiler/issues/60).
+- Source maps support ([#63](https://github.com/guida-lang/compiler/issues/63).
+- Guida-specific syntax for underscore wildcard variables ([#59](https://github.com/guida-lang/compiler/issues/59).
+- Format command (`guida format`) ([#58](https://github.com/guida-lang/compiler/issues/58), fixes [#42](https://github.com/guida-lang/compiler/issues/42)).
+- Self-hosted environment ([#9](https://github.com/guida-lang/compiler/issues/9)
+- `--optimize` flag for `build` command ([#36](https://github.com/guida-lang/compiler/issues/36)).
+
+### Changed
+
+- Bumped version to `1.0.0`.
+- Reduced size of `guida-stuff` from ~97.7 MB to ~27.5 MB.