v0.1.8-alpha.0 Resolved formatting/escaping issues

🐛 Bug Fixes
- Unwrap and rewrap body text correctly
	Previously, formatBody processed each line independently. When input
	text was already wrapped (but incorrectly), each line got rewrapped
	separately, making the wrapping worse. Now consecutive plain text
	lines are collected in a buffer, joined with spaces to unwrap them,
	then passed to wordWrap once as a single paragraph. Blank lines,
	bullet points, and numbered lists interrupt the buffer to preserve
	paragraph boundaries and list formatting.
- remove HTML escaping from commit bodies
	Commit messages are plaintext piped to 'git commit -F -' stdin, so
	HTML sanitization with bluemonday was unnecessary and harmful. It was
	escaping characters like < and > that should remain literal in commit
	text. Security is maintained through the stdin pipe preventing shell
	injection.

📚 Documentation
- replace usage section with related tools
- (installation): streamline setup
- (installation): add bin method

🔧 Build System
- migrate from just to task
	Replaced justfile with Taskfile.yaml adapted from nasin-pali project.
	Updated AGENTS.md to reference task commands instead of just commands.
- (crush): add to gopls settings
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