docs: update changelog with new entries and improved structure

Author: PrashamTrivedi

CHANGELOG.md

@@ -4,12 +4,32 @@
 
 ### Added
 
+- Added changelog documentation and guidelines
+- Added prompt files for Townie and OpenTownie templates with guidelines
+- Included prompt files in build tasks for all platforms
+
 ### Changed
 
-### Deprecated
+- Updated README with improved documentation for first-time visitors
+
+## [v0.2]
+
+### Added
+
+- Added validation for project name and description length
+
+## [v0.1]
+
+### Changed
+
+- Added type annotations to async parameters in tools
+- Updated Deno setup to version 2.x in workflows
+
+### Added
 
-### Removed
+- Added nightly and stable release workflows
+- Improved readability of LICENSE and README files
 
 ### Fixed
 
-### Security
+- Formatted documentation files for better readability