release: v0.1.0

[IMisbahk]

What

• Prepares Rey v0.1.0 release artifacts and docs.
• Audits and aligns syntax documentation with implemented compiler behavior.
• Cleans compiler warnings/dead code and normalizes diagnostics style where applicable.
• Verifies runtime samples/tests and fixes parser/runtime regressions found during release validation.
• Bumps compiler version to 0.1.0 and updates version references.
• Builds release binary and packages release assets under releases/0.1.0/.

Included in v0.1.0

• export pub visibility for externally importable functions (with compile-time checks for pub-only imports).
• File-level imports: import file.name, import file::{a, b}.
• Module-level imports: import module, import module::name, import module::{a, b} with main.rey module entry requirements.
• Import resolver with ordered lookup (local dir, project root, std path, package path).
• Scope injection rules for direct symbols and namespace imports.
• Import diagnostics for missing files/symbols, non-exported symbols, duplicate imports, and circular import paths.
• Import system test coverage under tests/imports/ plus release validation runs.

Validation

• cargo build
• cargo test
• cargo build --release
• sample and import execution checks via cargo run -- ...