Bump version to 0.2.0

[FrozenLemonTee]

No description provided.

[Copilot]

Pull request overview

This PR bumps the project version to 0.2.0 while also landing a substantial refactor of the primitives “policy/operation” stack to a handler-protocol + dispatcher pipeline architecture, plus updated tests and a refreshed set of examples.

Changes:

• Introduces policy handler protocol modules (policy.handler, policy.utility) and reworks built-in policies/tags into category sub-namespaces (policy::value::*, policy::type::*, etc.).
• Replaces the previous operations implementation with capability-tagged operations + a central dispatcher/invoker pipeline (concurrency → value → error).
• Updates/expands tests and replaces the single “basic” example with a set of focused examples (CMake + xmake).

Reviewed changes

Copilot reviewed 32 out of 32 changed files in this pull request and generated 5 comments.

Show a summary per file

File	Description
tests/basic/test_templates.cpp	Adds custom underlying/rep-type test coverage (custom numeric-like reps, rep validation, dispatcher behavior).
tests/basic/test_policies.cpp	Updates policy tag names and adds protocol/concurrency/capability tests.
tests/basic/test_operations.cpp	Rewrites operations tests for the new dispatcher + policy pipeline (value/error/type/concurrency behaviors).
src/underlying/traits.cppm	Extends underlying rep-type eligibility to allow “custom numeric-like” rep types and adjusts category consistency rules.
src/primitive/traits.cppm	Updates default policy resolution to use policy::defaults::*.
src/policy/utility.cppm	New: priority-based policy selection/merging utilities (common_policies_t).
src/policy/traits.cppm	Simplifies policy traits to concepts only (policy tags/merging moved out).
src/policy/policy.cppm	Exports new policy submodules (policy.handler, policy.utility).
src/policy/impl.cppm	Defines built-in policy tags in category namespaces + default handler specializations.
src/policy/handler.cppm	New: defines handler protocol contracts and shared types for error/value/type/concurrency policy layers.
src/operations/traits.cppm	Refactors operations traits into arity/capability metadata and validation concepts.
src/operations/operators.cppm	Implements operations::apply/add/sub/mul/div/equal/not_equal + operator overloads routed through the dispatcher.
src/operations/operations.cppm	Re-exports dispatcher as part of the operations entry module.
src/operations/invoker.cppm	New: runtime value op bindings + checked/unchecked/saturating arithmetic and error construction helpers.
src/operations/impl.cppm	Redefines built-in operation tags (Addition/Subtraction/…) and their capability metadata.
src/operations/dispatcher.cppm	New: compile-time negotiation + runtime pipeline dispatcher (rep validation, normalization, handler chaining).
examples/xmake.lua	Replaces single example target with a loop building multiple example binaries.
examples/ex01_default_arithmetic.cpp	New: demonstrates default arithmetic through operators/dispatcher.
examples/ex02_type_policy.cpp	New: demonstrates strict vs compatible type policy negotiation (compile-time).
examples/ex03_value_policy.cpp	New: demonstrates checked/unchecked/saturating overflow behavior.
examples/ex04_error_policy.cpp	New: demonstrates expected vs throwing error behavior.
examples/ex05_concurrency_policy.cpp	New: demonstrates atomic concurrency policy consistency under concurrency.
examples/ex06_custom_underlying.cpp	New: demonstrates custom underlying traits + rep validation mapped to domain errors.
examples/ex07_custom_policy.cpp	New: demonstrates implementing custom policy handlers and op bindings.
examples/ex08_custom_operation.cpp	New: demonstrates adding custom operations + runtime bindings.
examples/basic.cpp	Removes the old monolithic basic example.
examples/CMakeLists.txt	New: builds each example as its own executable linked against the library.
README.md	Updates documentation to the new policy tag namespaces and protocol surface.
CMakeLists.txt	Bumps version to 0.2.0; switches module file globbing to CONFIGURE_DEPENDS; moves examples to subdirectory.
.github/prompts/plan-policyBehaviorProtocol.prompt.md	New: design/plan doc describing the policy behavior protocol and dispatcher approach.
.github/copilot-instructions.md	Links the current in-progress plan under .github/prompts/.
.agents/docs/architecture.md	Documents stdlib usage convention for modules (headers in global module fragment; avoid import std;).

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