alib #10: `stdlib/alib.affine` conformance module

[hyperpolymath]

Child issue of #413 (aLib umbrella). Item alib #10 in docs/alib-roadmap.adoc.

What

Create stdlib/alib.affine: a module that re-exports the 20 aLib operations under their aLib-canonical names, so that consumers wanting the aLib surface can use stdlib::alib::add (etc.) rather than the AffineScript-idiomatic surface.

This is the Phase-A scaffolding step — it's a re-export module, not a new implementation. Most ops already exist in stdlib/math.affine / stdlib/string.affine / stdlib/collections.affine. The work is alignment + a single import point.

Why

• Single import surface for cross-language code written against aLib.
• Phase-A scaffolding for conformance work (alib ci: Bump trufflesecurity/trufflehog from 3.94.1 to 3.94.2 #11 schema loader + ci: Bump webfactory/ssh-agent from 0.9.1 to 0.10.0 #12 test-vector executor depend on this module existing).
• Smallest scope Tier-1 item in the alib roadmap.

The 20 ops (per aLib v0.1.0 data/aggregate.json)

Category	Ops
arithmetic	add, subtract, multiply, divide, modulo, negate, absolute, max, min
string	concat, length, reverse, substring
collection	contains, empty, filter, fold, length, map
comparison	(per aggregate.json — verify count)
logical	(per aggregate.json — verify count)
conditional	if_then_else

Done when

• stdlib/alib.affine exists, re-exports the 20 ops under their aLib names
• Each re-export's signature matches the aLib signature_string
• Module type-checks under affinescript check
• docs/alib-roadmap.adoc row ci: Bump erlef/setup-beam from 1.17.5 to 1.24.0 #10 status updated ○ → ◐ / ●
• Inventory snapshot in the doc updated to reflect the new file

Out of scope (for this issue)

• Test-vector running (that's alib ci: Bump webfactory/ssh-agent from 0.9.1 to 0.10.0 #12)
• Properties checking (alib ci: Bump actions/configure-pages from 5.0.0 to 6.0.0 #13)
• Schema loader (alib ci: Bump trufflesecurity/trufflehog from 3.94.1 to 3.94.2 #11)
• Edge-case coverage (alib ci: Bump github/codeql-action from 4.31.10 to 4.35.1 #7) — listed separately so it can be deferred until collection/string runtime gaps close (stdlib ci: Bump actions/setup-node from 4.0.2 to 6.3.0 #1, ci: Bump dtolnay/rust-toolchain from f7ccc83f9ed1e5b9c81d8a67d7ad1a747e22a561 to efa25f7f19611383d5b0ccf2d1c8914531636bf9 #2, ci: Bump dtolnay/rust-toolchain from efa25f7f19611383d5b0ccf2d1c8914531636bf9 to 3c5f7ea28cd621ae0bf5283f0e981fb97b8a7af9 #8, ci: Bump actions/checkout from 4.1.1 to 6.0.2 #9)

Refs

• docs/alib-roadmap.adoc — alib ci: Bump erlef/setup-beam from 1.17.5 to 1.24.0 #10
• hyperpolymath/aggregate-library — methods repo v0.1.0
• data/aggregate.json in aggregate-library — canonical signature list