Add Rust/C# AI rules and update quickstarts

[cloutiertyler]

Description of Changes

• Add spacetimedb-rust.mdc with Rust-specific patterns and common mistakes
• Add spacetimedb-csharp.mdc with C#-specific patterns and common mistakes
• Update spacetimedb-typescript.mdc with views and procedures sections
• Update CLI build.rs to embed all language-specific AI rules
• Update CLI init.rs to install language-appropriate rules to projects
• Update quickstarts to use interactive project naming (no hardcoded name)
• Use placeholder for CLI command examples

API and ABI breaking changes

Updates the CLI to output more AI files on init

Expected complexity level and risk

1

Testing

[cloutiertyler]

/update-llm-benchmark

[clockwork-labs-bot]

LLM Benchmark Results (ci-quickfix)

Language	Mode	Category	Tests Passed	Pass %	Task Pass %
Rust	rustdoc_json	basics	20/27	74.1%	75.0%
Rust	rustdoc_json	schema	24/34	70.6%	63.3%
Rust	rustdoc_json	total	44/61	72.1%	69.7%
C#	docs	basics	24/27	88.9%	83.3%
C#	docs	schema	20/34	58.8%	60.0%
C#	docs	total	44/61	72.1%	72.7%

_{Generated at: 2026-01-16T03:26:00.148Z}