Add Copilot instructions for Ionide.ProjInfo project

Author: TheAngryByrd

.github/copilot-instructions.md

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+# Copilot Instructions for Ionide.ProjInfo
+
+## Project Overview
+- **Ionide.ProjInfo** is a set of F# libraries and tools for parsing and evaluating `.fsproj` and `.sln` files, used by F# tooling (e.g., Ionide, FSAC, Fable, FSharpLint).
+- Major components:
+  - `Ionide.ProjInfo`: Core project/solution parsing logic (uses Microsoft.Build APIs).
+  - `Ionide.ProjInfo.FCS`: Maps project data to FSharp.Compiler.Service types.
+  - `Ionide.ProjInfo.ProjectSystem`: High-level project system for editor tooling (change tracking, notifications, caching).
+  - `Ionide.ProjInfo.Tool`: CLI for debugging project cracking.
+
+## Build & Test Workflows
+- **Restore tools:** `dotnet tool restore`
+- **Build solution:** `dotnet build ionide-proj-info.sln`
+- **Run all tests:** `dotnet run --project build -- Test`
+- **Multi-TFM testing:**
+    - For specific TFM:
+        - LTS (net8.0) `dotnet run --project build -- Test:net8.0`
+        - STS (net9.0) `dotnet run --project build -- Test:net9.0`
+
+- **Test assets:** Test projects in `test/examples/` cover a wide range of real-world project structures (multi-TFM, C#/F#, old/new SDK, solution filters, etc.).
+
+## Key Patterns & Conventions
+- **Project loading:** Prefer using the MSBuild loader; use `--graph` for graph-based loading in CLI tool.
+- **Output formats:** CLI tool supports structured text, FCS options (`--fcs`), or JSON (`--serialize`).
+- **Cross-language:** Handles both F# and C# projects/references.
+- **Persistent caching:** ProjectSystem caches data for fast reloads.
+- **Testing:** Uses Expecto for tests; see `test/Ionide.ProjInfo.Tests/` for patterns.
+- **Release process:** Update `CHANGELOG.md`, tag, and push (see `CONTRIBUTING.md`).
+
+## Integration Points
+- Consumed by Fable, FSAC, Ionide, FSharpLint, and F# Formatting.
+- External dependencies: Microsoft.Build, FSharp.Compiler.Service (FCS).
+- Nightly builds may require custom NuGet feeds (see `CONTRIBUTING.md`).
+
+## Where to Look
+- **Architecture:** See `README.md` (root), `src/` for main libraries, `test/examples/` for project scenarios.
+- **Developer workflow:** `CONTRIBUTING.md` for build/test/release details.
+- **Tool usage:** `src/Ionide.ProjInfo.Tool/README.md` and `Program.fs`.
+- **Test patterns:** `test/Ionide.ProjInfo.Tests/` and helpers in `FileUtils.fs`.
+
+## Code of Conduct
+- See `CODE_OF_CONDUCT.md` for community standards.
+
+---
+For more, see https://github.com/ionide/dotnet-proj-info and linked docs.
+
+
+### MCP Tools
+
+> [!IMPORTANT]
+
+You have access to a long-term memory system via the Model Context Protocol (MCP) at the endpoint `memorizer`. Use the following tools:
+- `store`: Store a new memory. Parameters: `type`, `content` (markdown), `source`, `tags`, `confidence`, `relatedTo` (optional, memory ID), `relationshipType` (optional).
+- `search`: Search for similar memories. Parameters: `query`, `limit`, `minSimilarity`, `filterTags`.
+- `get`: Retrieve a memory by ID. Parameter: `id`.
+- `getMany`: Retrieve multiple memories by their IDs. Parameter: `ids` (list of IDs).
+- `delete`: Delete a memory by ID. Parameter: `id`.
+- `createRelationship`: Create a relationship between two memories. Parameters: `fromId`, `toId`, `type`.
+Use these tools to remember, recall, relate, and manage information as needed to assist the user. You can also manually retrieve or relate memories by their IDs when necessary.