Remove Tailwind and NPM dependency from chat template

[MackinnonBuck]

This PR:

1. Removes tailwind classes from Razor components and replaces them with CSS classes defined in the project
2. Removes NPM as a dependency and instead includes external dependencies directly in the wwwroot folder

Fixeshttps://github.com/dotnet/ai-private-planning/issues/272
Fixeshttps://github.com/dotnet/ai-private-planning/issues/273

Microsoft Reviewers: Open in CodeFlow

[dotnet-comment-bot]

‼️Found issues‼️

Project	Coverage Type	Expected	Actual
Microsoft.Gen.MetadataExtractor	Line	98	57.35 🔻
Microsoft.Gen.MetadataExtractor	Branch	98	62.5 🔻
Microsoft.Extensions.Caching.Hybrid	Line	86	77.82 🔻
Microsoft.Extensions.AI.Ollama	Line	80	78.25 🔻

🎉 Good job! The coverage increased 🎉
Update MinCodeCoverage in the project files.

Project	Expected	Actual
Microsoft.Extensions.AI.OpenAI	77	78
Microsoft.Extensions.AI.Abstractions	83	84
Microsoft.Extensions.AI	88	89

Full code coverage report: https://dev.azure.com/dnceng-public/public/_build/results?buildId=940194&view=codecoverage-tab

[SteveSandersonMS]

Excellent - thanks very much! What you've done with the CSS looks perfect.

I added some minor suggestions about using CSS shorthand syntax in a few places. I'm pretty sure none of them will change the resulting styles, but it's possible I could have a typo in there so please let me know if anything looks wrong.

[dotnet-comment-bot]

‼️Found issues‼️

Project	Coverage Type	Expected	Actual
Microsoft.Extensions.AI.Ollama	Line	80	78.25 🔻
Microsoft.Gen.MetadataExtractor	Line	98	57.35 🔻
Microsoft.Gen.MetadataExtractor	Branch	98	62.5 🔻

🎉 Good job! The coverage increased 🎉
Update MinCodeCoverage in the project files.

Project	Expected	Actual
Microsoft.Extensions.AI.Abstractions	83	84
Microsoft.Extensions.Caching.Hybrid	86	87
Microsoft.Extensions.AI.OpenAI	77	78
Microsoft.Extensions.AI	88	89

Full code coverage report: https://dev.azure.com/dnceng-public/public/_build/results?buildId=941270&view=codecoverage-tab