TAIDL-TO v2.11

Changes since v2.10, values outside the 64-bit range and the names an oracle reserves:

• Pinned TAIDL v2.15 (#190)
• Warned of a value outside the 64-bit range and refused a negative kernel dimension (#193)
• Lowered dot and concatenate at the 2-bit types (#195)
• Documented the reserved names and dropped an unreachable type refusal (#196)
• Added NOTICE (#197)

What changes for users:

• TAIDL-TO pins TAIDL v2.15, which the other repositories of ACT v2.4 pin too.
• A call warns with a UserWarning that names it, for a value outside the signed 64-bit range:
  • an attribute
  • a region's start
  • a size or a semantics dimension that an expression gives
• kernel warns the same way of an HBM size or an address outside that range. Every value is still computed exactly.
• A start that a loop expression gives is computed in the module in signed 64-bit integers, which wrap when a step overflows. The call checks its window at the exact value.
• A kernel with a shape dimension below zero raises a ValueError that names it, where its module used to fail to parse.
• dot and concatenate lower at s2 and u2. A dot with a 2-bit operand or result computes at 8 bits.
• The README lists the names an oracle reserves, which generate_oracle refuses.

This release:

• The version is 2.11 in pyproject.toml and taidl_to/__init__.py. The README's install line names v2.11.
• NOTICE names the copyright of the ACT contributors and the software developed at the University of Illinois Urbana-Champaign.