runtime/AOT: support OpenCode's WebAssembly modules and packaged .wasm assets

[proggeramlug]

Parent: #8506

Problem

The complete OpenCode graph uses WebAssembly in several real feature paths:

• @silvia-odwyer/photon-node for image processing, including file-style WASM imports
• web-tree-sitter plus Bash/PowerShell and downloadable language grammar modules
• @pierre/diffs worker/WASM assets

Perry has a WebAssembly host and previously completed #5234/#6558, but the full-source target needs the complete combination of runtime APIs, wasm-bindgen glue, dynamic grammar loading, and output asset packaging. A Photon-only native replacement would not cover tree-sitter's arbitrary grammar modules.

Scope

• WebAssembly.Module, Instance, Memory, Table, globals, imports, and exports
• sync and async compile/instantiate shapes used by these packages
• wasm-bindgen glue and its JS↔WASM import cycle
• import ... from "./x.wasm" and with { type: "file" }
• embedding/copying WASM assets into the native output with stable runtime paths
• actionable compile errors for unsupported WASM forms; never silently defer to a JS engine

Acceptance

• A Perry-compiled Photon smoke test loads and executes its shipped WASM
• a Perry-compiled web-tree-sitter smoke test loads a grammar and parses source
• OpenCode's image, shell parser, and diff paths work from the tracking: compile and run the complete OpenCode source graph without feature stripping or a JS runtime #8506 full-source build
• the output runs without V8 or another JavaScript runtime