Print sources when DEBUG=* is set

[RobinMalfait]

This PR improves the debug logging by also adding the provided @source to the log file. It will also print the optimized sources (the ones we expand and mark as Auto or Pattern).

In the logs, this will look like this:

2025-05-09T11:03:32.906478Z  INFO tailwindcss_oxide::scanner: Provided sources:
2025-05-09T11:03:32.906544Z  INFO tailwindcss_oxide::scanner: Source: PublicSourceEntry { base: "/Users/robin/github.com/RobinMalfait/spreadsheet", pattern: "**/*", negated: false }
2025-05-09T11:03:32.906589Z  INFO tailwindcss_oxide::scanner: Optimized sources:
2025-05-09T11:03:32.906595Z  INFO tailwindcss_oxide::scanner: Source: Auto { base: "/Users/robin/github.com/RobinMalfait/spreadsheet" }

Or if you have more sources:

2025-05-09T11:06:54.767546Z  INFO tailwindcss_oxide::scanner: Provided sources:
2025-05-09T11:06:54.767660Z  INFO tailwindcss_oxide::scanner: Source: PublicSourceEntry { base: "/Users/robin/github.com/RobinMalfait/spreadsheet", pattern: "**/*", negated: false }
2025-05-09T11:06:54.767987Z  INFO tailwindcss_oxide::scanner: Source: PublicSourceEntry { base: "/Users/robin/github.com/RobinMalfait/spreadsheet/app", pattern: "./routes/*.{jsx,tsx}", negated: false }
2025-05-09T11:06:54.767992Z  INFO tailwindcss_oxide::scanner: Source: PublicSourceEntry { base: "/Users/robin/github.com/RobinMalfait/spreadsheet/app", pattern: "./utils/*.ts", negated: false }
2025-05-09T11:06:54.768450Z  INFO tailwindcss_oxide::scanner: Optimized sources:
2025-05-09T11:06:54.768455Z  INFO tailwindcss_oxide::scanner: Source: Auto { base: "/Users/robin/github.com/RobinMalfait/spreadsheet" }
2025-05-09T11:06:54.768459Z  INFO tailwindcss_oxide::scanner: Source: Pattern { base: "/Users/robin/github.com/RobinMalfait/spreadsheet/app/routes", pattern: "*.jsx" }
2025-05-09T11:06:54.768462Z  INFO tailwindcss_oxide::scanner: Source: Pattern { base: "/Users/robin/github.com/RobinMalfait/spreadsheet/app/routes", pattern: "*.tsx" }
2025-05-09T11:06:54.768466Z  INFO tailwindcss_oxide::scanner: Source: Pattern { base: "/Users/robin/github.com/RobinMalfait/spreadsheet/app/utils", pattern: "*.ts" }

[philipp-spiess]

Nice!