Add LiNo import support for C# and Rust

[konard]

Summary

• Resolve the merge conflict with main and keep the current C# layout plus Rust/WASM additions.
• Add LiNo database import support to C# and Rust via --in, --lino-input, and --import.
• Preserve numbered .lino links at their explicit indexes and treat named or out-of-range references as named unicode string links in the named mode used by default.
• Add unit and CLI integration tests for numbered import, named references, out-of-range numeric names, and import/export round trips.

Reproduce

Create a LiNo file such as:

(1: 1 1)
(2: 1 2)
(3: 2 1)

Then import and export it with either implementation:

# C#
dotnet run --project csharp/Foundation.Data.Doublets.Cli -- --db imported.links --import input.lino --export output.lino

# Rust
cargo run --manifest-path rust/Cargo.toml -- --db imported.links --import input.lino --export output.lino

output.lino preserves the numbered links exactly.

Tests

• dotnet build csharp/Foundation.Data.Doublets.Cli.sln --configuration Release
• dotnet test csharp/Foundation.Data.Doublets.Cli.sln --configuration Release --no-build
• cargo fmt --manifest-path rust/Cargo.toml --all -- --check
• RUSTFLAGS=-Dwarnings cargo clippy --manifest-path rust/Cargo.toml --all-targets --all-features
• cargo test --manifest-path rust/Cargo.toml --all-features --verbose
• cargo test --manifest-path rust/Cargo.toml --doc --verbose
• node scripts/check-file-size.mjs --lang rust
• npm ci
• npm run test:wasm
• npm run build

Fixes #25

[konard]

We need to resolve conflicts. And we already have --export, now we need --import option for both Rust and C# code, it should read .lino file and if it contains only numbered links, we should reproduce them in our data store exactly. Any non-numbered links, or numbers that outside of supported range by ILinksContants should be treated as named (unicode string names) links references, if named operational mode is enabled. Or to simplify it for user, we can just enable named mode by default, numbered mode is not enough.

[konard]

🤖 AI Work Session Started

Starting automated work session at 2026-05-08T10:37:31.334Z

The PR has been converted to draft mode while work is in progress.

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[konard]

Working session summary

Implemented and pushed the fix to PR 43: #43

What changed:

• Resolved the merge conflict with main; PR merge status is now CLEAN.
• Added LiNo import support for both C# and Rust via --in, --lino-input, and --import.
• Numbered .lino links import at exact indexes.
• Named and out-of-range references import as named unicode string references in named mode.
• Added C# and Rust unit/integration coverage plus release notes/changelog fragments.
• Updated the PR title/body and marked it ready for review.

Verification:

• Local C# Release build/test passed.
• Local Rust fmt, clippy, all-feature tests, doc tests, and file-size check passed.
• Local WASM npm ci, npm run test:wasm, and npm run build passed.
• GitHub CI is passing for the pushed head 51d2055844b916116e23094b2e4a74024d599949: C#, Rust, and WebAssembly workflows all succeeded.

Working tree is clean.

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[konard]

🤖 Solution Draft Log

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💰 Cost estimation:

• Model: GPT-5.5
• Provider: OpenAI
• Public pricing estimate: $17.725025

📊 Context and tokens usage:

• 333.3K / 1.1M (32%) input tokens, 51.2K / 128K (40%) output tokens

Total: (333.3K + 12.1M cached) input tokens, 51.2K output tokens, $17.725025 cost

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• Model: GPT-5.5 (gpt-5.5)

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[konard]

✅ Ready to merge

This pull request is now ready to be merged:

• All CI checks have passed
• No merge conflicts
• No pending changes

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