BE-257: HashQL: Implement MIR interpreter with runtime value representation

[indietyp]

🌟 What is the purpose of this PR?

Add MIR interpreter for executing HashQL code at runtime. This implements a stack-based interpreter that can execute MIR code, handle function calls, and manipulate runtime values.

🔍 What does this change?

• Adds a complete MIR interpreter implementation in libs/@local/hashql/mir/src/interpret/
• Implements runtime value representation with support for primitives, aggregates, and collections
• Adds error handling and diagnostic reporting for runtime errors
• Implements a call stack for function execution and tracking
• Adds support for binary and unary operations, control flow, and function calls
• Enhances the newtype! macro to support custom display formatting
• Adds reserve method to InternSet for preallocating capacity
• Updates ID display formatting for better readability in error messages

Pre-Merge Checklist 🚀

🚢 Has this modified a publishable library?

This PR:

• does not modify any publishable blocks or libraries, or modifications do not need publishing

📜 Does this require a change to the docs?

The changes in this PR:

• are internal and do not require a docs change

🕸️ Does this require a change to the Turbo Graph?

The changes in this PR:

• do not affect the execution graph

🛡 What tests cover this?

• Comprehensive test suite for the interpreter covering basic execution, operations, control flow, function calls, and error handling
• Tests for value representation and manipulation

❓ How to test this?

1. Run the test suite with cargo test -p hashql-mir
2. Run Miri tests with cargo miri test -p hashql-mir

[cursor]

PR Summary

Introduces a fully functional MIR interpreter capable of executing MIR with function calls, control flow, and runtime values.

• Adds interpreter runtime (interpret/{mod.rs,runtime.rs,locals.rs,error.rs,scratch.rs}) with call stack, recursion limit, operand/place evaluation, aggregates, and rich runtime error diagnostics
• Extends Int with Not/Neg and bitwise ops (and tests); adds op![~] support
• Improves ID formatting and displays: BasicBlockId (bb{}), Local (%{}); Location/Place string rendering tweaks
• Enhances newtype! macro with #[display = ..] and #[no_display]; adds InternSet::reserve() and preallocates kinds in type environment
• Adds imbl dependency (and transitive types) and bumps itertools in prost-*; updates hashql-mir miri test target
• Adds bundled/dereferenced entity schema fixtures for organization and person

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