chore: bump version to 0.3.11

[appcypher]

Summary

• Bump all microsandbox Cargo crates from 0.3.10 to 0.3.11 (workspace version, all internal dependency references, and agentd's separate workspace)
• Bump all microsandbox npm packages from 0.3.10 to 0.3.11 (microsandbox SDK, microsandbox-mcp, platform-specific binary packages, and all TypeScript examples)
• Includes a minor test fix in agentd session tests (use -c instead of -lc shell flag and add explicit exit 0)

Changes since 0.3.10:

• refactor(filesystem): extract shared dir snapshot logic and add inject_init config (refactor(filesystem): extract shared dir snapshot and add inject_init config #495)
• fix(filesystem): fix symlink xattr ops, init listxattr, and update docs (fix(filesystem): fix symlink xattr ops, init listxattr, and update docs #493)
• docs: replace broken DEVELOPMENT.md references with just setup workflow (docs: replace broken DEVELOPMENT.md references with just setup workflow #482)

Test Plan

• Run cargo build to verify successful compilation with new version
• Run cargo clippy to verify no warnings
• Verify agentd builds: cd crates/agentd && cargo build
• Confirm no remaining references to 0.3.10: grep -r "0.3.10" --include="*.toml" --include="*.json"