v1.7.0

Added

• Central connection config. A ~/.bc-mcp/config.jsonc (or BC_MCP_CONFIG
  / <cwd>/.bc-mcp.jsonc) file defines named connections, an optional
  default, and an optional map[] from repo path to connection, so one
  globally-registered server can serve multiple BC instances without a
  BC_* env block per repo. Resolution order per field: an explicit BC_*
  env var, then BC_CONNECTION=<name>, then a map[] path match, then
  default. Secrets can be kept out of the file with ${ENV} references.
  A <cwd>/.env (or BC_ENV_FILE) is also auto-loaded at startup
  (override:false — real environment variables still win). With no config
  file and no .env present, the server behaves exactly as before.

Full Changelog: v1.6.0...v1.7.0