V1 Finalization

[austin-denoble]

Problem

AGENTS.md and README.md were last updated before several significant PRs landed (#84–#92) and still carried public-preview language, stale command references, and large gaps in coverage.

Solution

README.md

• Removed the public-preview warning banner
• Fixed two legacy pc config set-api-key references → pc config set api-key
• Fixed pc index upsert → pc index vector upsert in the working-with-data intro
• Expanded the data-plane overview: reorganized pc index vector commands under a "dense/sparse vectors" subheading, added pc index record (integrated indexes) and pc index namespace entries
• Added a new "Index management commands" section covering pc index backup, pc index restore, pc index import, and pc index collection

AGENTS.md

• Removed "public preview" from the project description
• Corrected the VectorDB root group (collection/backup/restore now live under pc index, not at the root)
• Added pc index internal subgroup table (Data, Namespace, Index Management including the new import)
• Documented the canonical pc config key-based interface (get/set/unset/list/describe)
• Added scripts/ to the key directories table
• Added a new "Patterns for writing commands" section covering: output/error/exit packages (msg, style, exit, text), help-text helpers, custom JSON flag types, the narrow-interface testability pattern, target org/project access, and logging
• Added a "Notable environment variables" table (PINECONE_API_KEY, PINECONE_ENVIRONMENT, PINECONE_LOG_LEVEL, PINECONE_CLI_MAX_JSON_BYTES)

Type of Change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Non-code change (docs, etc)