Firecrawl CLI v1.26.0

• Bump CLI version to 1.26.0
• refactor: rename to gov
• docs: rename the index
• test: trim remaining duplicate cases
• test: drop redundant cases
• feat(search): accept the gov category
• docs: link the REST reference from the search command
• fix(index): exit non-zero on an unsuccessful response
• refactor(index): move the endpoint to /search/gov
• feat(index): add a search command