Add Fig autocompletion spec

[timkendall]

Might be nice to offer an integration with Fig for VSCode-style terminal autocompletion (distribution seems to be as easy as storing a new .js module in ~/.fig/autocomplete; it looks like they might have some package.json integration).

// To learn more about Fig's autocomplete standard visit: https://fig.io/docs/autocomplete/building-a-spec#building-your-first-autocomplete-spec

// The below is a dummy example for git. Make sure to change the file name!
export const completion: Fig.Spec = {
  name: "tql",
  description: "Generate a fluent TypeScript client for your GraphQL API.",
  args: [
    { 
      name: 'schema',
      description: 'GraphQL schema from HTTP endpoint or local .graphql file.',

      // @todo discover a local dir schema via. .graphqlconfig?
      // generators: [
      //   {
      //     script: "git branch -l",
      //     postProcess: function(out) {
      //       return out.split('\n').map(branch => {
      //         return { name: branch, description: "branch"}
      //       })
      //     }
      //   }
      // ]
    }
  ],
  subcommands: [],
  options: [
    {
      name: ["-v", "--version"],
      description: "View tql version",
    },
    {
      name: ["-c", "--client"],
      description: "Generate an SDK client for the API",
    },
    {
      name: ["-t", "--tag"],
      description: 'Semantic versioning tag, ex. "1.0.0" (defaults to "unversioned")'
    },
    {
      name: ['--mutableFields'],
      description: 'Generate schema types and results as mutable (default is read-only).',
    },
    {
      name: '--module-path',
      description: 'Optional path to the @timkendall/tql module to be included (CDN, private registry, etc.).'
    }
  ],
};