feat: v0.11 CHD support and default-off loading mod

[mstan]

Summary

• pin psxrecomp PR feat(runtime): CHD support and mod-owned loading modes psxrecomp#100 for direct CHD mounting, strict selected-device input routing, mod-owned loading services, and portable ZIP creation
• replace Tomba's generic/default-on loading accelerators with one default-off Fast Loading mod
• make recommended host-pacing and experimental guest-visible CD timing mutually exclusive values in one bounded dropdown
• keep authentic 1x CD timing, turbo loads, idle skipping, and the old warm-disc experiment off by default
• package CHD notices and produce standards-compliant ZIP entry paths
• update the shared launcher pin and v0.11.0-alpha release notes

Issue references

Addresses #5.
Addresses #10.
Addresses #12.
Addresses #14.

These references are intentionally collected here; no comments were posted to the issue threads.

Loading policy

• Host pacing: 2x, 4x (recommended), 8x, 16x, uncapped
• CD timing (experimental): 2x, 4x, bounded instant
• the feature itself defaults off
• the option is a dropdown, not free-form input, so unsupported/risky values cannot be entered
• host and CD modes cannot run together

Validation

• full optimized Windows Tomba build with SDL3, current launcher, libchdr, all 38 generated game shards, OpenBIOS, and every native mod plugin
• staged Fast Loading manifest verified in the build output
• package_release.ps1 syntax validation
• manifest/default/choice guard
• upstream load/input/portable-ZIP regression guards
• git diff --check