HTML parsing and templating in Zig.

Features

• Write Zig structs and then convert to HTML.
• Parse HTML for querying purposes.

Tests

• zig test --test-filter "parse html from file simple" src/root.zig
• zig test -femit-docs --test-filter "template to string simple" src/template.zig
• zig test -femit-docs --test-filter "template to string complex" src/template.zig