[PyCDE] Removing pycde.types.types functionality

[teqdruid]

This was just a shortcut which proved unwise.

[Copilot]

Pull Request Overview

This PR removes the pycde.types.types shortcut functionality, which was a convenience wrapper providing attribute-based type access (e.g., types.i32, types.struct()). All usages have been updated to use explicit type constructors.

Key Changes

• Removed the _Types class and types singleton from pycde/types.py
• Updated all references from types.iN pattern to explicit Bit/Bits(N) constructors
• Updated imports across 21 test files and 6 source files to use specific type imports

Reviewed Changes

Copilot reviewed 28 out of 28 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
frontends/PyCDE/src/pycde/types.py	Removed _Types class and types singleton; updated internal uses to Bit
frontends/PyCDE/src/pycde/signals.py	Replaced types.* with explicit Bit, Bits, and Array constructors
frontends/PyCDE/src/pycde/fsm.py	Replaced types.i1 with Bit
frontends/PyCDE/src/pycde/esi.py	Removed unused types import
frontends/PyCDE/src/pycde/constructs.py	Replaced types.i1 with Bit in ControlReg
frontends/PyCDE/src/pycde/init.py	Removed types from exports
frontends/PyCDE/test/test_verilog_readablility.py	Updated to use Bits constructor
frontends/PyCDE/test/test_syntactic_sugar.py	Updated to use Bits, StructType, and TypeAlias
frontends/PyCDE/test/test_pycde_values.py	Updated to use Bit and Bits
frontends/PyCDE/test/test_pycde_types.py	Updated to use explicit type constructors
frontends/PyCDE/test/test_polynomial.py	Updated to use Bit, Bits, StructType, and TypeAlias
frontends/PyCDE/test/test_ndarray_errors.py	Updated to use Bit and Bits
frontends/PyCDE/test/test_ndarray.py	Updated to use Bit and Bits
frontends/PyCDE/test/test_muxing.py	Updated to use Bit
frontends/PyCDE/test/test_module_naming.py	Updated to use Bit
frontends/PyCDE/test/test_instances.py	Updated to use Bit
frontends/PyCDE/test/test_hwarith.py	Updated to use Bit, Bits, SInt, and UInt
frontends/PyCDE/test/test_handshake.py	Updated to use explicit type constructors
frontends/PyCDE/test/test_generator_options.py	Updated to use Bits
frontends/PyCDE/test/test_fsm_errors.py	Updated to use Bit and Bits
frontends/PyCDE/test/test_fsm.py	Updated to use Bit
frontends/PyCDE/test/test_esi_errors.py	Updated to use explicit type constructors with helper constants
frontends/PyCDE/test/test_esi.py	Updated to use explicit type constructors with helper constants
frontends/PyCDE/test/test_errors.py	Updated to use Bits and SInt
frontends/PyCDE/test/test_constructs_errors.py	Updated to use Bit and Bits with helper constants
frontends/PyCDE/test/test_constructs.py	Updated to use Bit and Bits with helper constants
frontends/PyCDE/test/test_cocotb_testbench.py	Updated to use Bit and Bits
frontends/PyCDE/integration_test/pytorch/dot_prod_system.py	Updated to use Bit and Bits

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