v1.2

Profiles

• `microvault profile [service2 ...]` — define a named, non-secret group of service names.
• `microvault env --profile [--json]` — export only that profile's keys; `--json` batches a whole profile into one password prompt for a calling tool instead of one prompt per key.
• Python API: `vault.profile_services()`, `vault.env_profile()`.

MeXiCOSINT integration

• Fixed stale/incorrect service names in the README's setup guide.
• Documented the new `microvault profile mexicosint ...` step, so MeXiCOSINT only ever sees its own 5 keys instead of the whole vault.

Docs

• New landing page for GitHub Pages (`docs/index.html`).