Rename crates to trusted-server-core and trusted-server-adapter-fastly

[prk-Jr]

Summary

• Rename crates/common → crates/trusted-server-core and crates/fastly → crates/trusted-server-adapter-fastly to follow the EdgeZero naming convention
• Add EdgeZero workspace dependencies (edgezero-core, edgezero-adapter-fastly, edgezero-adapter-axum, edgezero-adapter-cloudflare) pinned to rev 170b74b
• Update all references to old crate names across docs, configuration, scripts, CI workflows, and agent/command files

Changes

File	Change
Cargo.toml	Replaced crates/common and crates/fastly workspace members; added EdgeZero deps; bumped toml to 1.0
crates/trusted-server-core/	Renamed from crates/common/ — all source files preserved
crates/trusted-server-adapter-fastly/	Renamed from crates/fastly/ — all source files preserved
fastly.toml	Updated name and build script binary to trusted-server-adapter-fastly
CLAUDE.md / AGENTS.md	Updated workspace layout, key file paths, and build commands
docs/guide/*.md	Updated all crate path references
.claude/agents/*.md / .claude/commands/*.md	Updated crate names in agent and command docs
.github/workflows/*.yml	Updated workflow references to new crate names
scripts/integration-tests*.sh	Updated script references
crates/integration-tests/	Updated runtime and browser setup references

Closes

Closes #482

Test plan

• cargo fmt --all -- --check
• cargo clippy --workspace --all-targets --all-features -- -D warnings
• cargo test --workspace
• JS tests: cd crates/js/lib && npx vitest run
• JS format: cd crates/js/lib && npm run format
• Docs format: cd docs && npm run format
• WASM build: cargo build --package trusted-server-adapter-fastly --release --target wasm32-wasip1
• Manual testing via fastly compute serve

Checklist

• Changes follow CLAUDE.md conventions
• No unwrap() in production code — use expect("should ...")
• Uses tracing macros (not println!)
• New code has tests
• No secrets or credentials committed