v0.1.0

The first release: the front end of the Synod compiler. It reads, checks
the form of, and formats Synod source for specification v0.2.0. Running
programs (synod run) comes in a later release.

Added

• synod fmt [paths…] rewrites .synod files into canonical form;
  --check lists the files that would change and exits 1.
• synod check [paths…] reports syntax, indentation, header and
  canonical-form errors, with a hint showing the canonical line;
  --json prints the synod-check/1 format.
• synod version prints the language, compiler and format versions; the
  compiler line shows the release tag and the commit it was built from.
• Lexer and parser for the whole structure grammar: indentation blocks,
  comments, continuation lines (else, otherwise), holes, typed
  collections, members, import paths.
• Canonical formatting: numbers, durations and colors respelled; single-item
  parentheses removed; not (…) rewritten to the direct operator; imports
  hoisted and sorted; blank lines and comments laid out.
• Binaries for macOS (arm64, amd64, universal), Linux (amd64, arm64) and
  Windows (amd64, arm64); install with Homebrew
  (brew install synodlang/tap/synod), Scoop, install.sh or
  go install. See https://synodlang.github.io/install/.

Known limitations

• Binaries are not code-signed: macOS and Windows warn when they are
  downloaded with a browser. Package managers and install.sh avoid this.
• Phrase resolution, types and contexts are not checked yet.