docs(readme): remove outdated Framework Structure section

  `vX.Y.Z` tag (what consumers pin) is present on both; the rich Release page

  lives on code.stanford.edu.

## Framework Structure

```

~/.otica/

├── README.md         # This file

├── CONTRIBUTING.md   # Contributor workflow, conventions, changelog trailers

├── LICENSE

├── VERSION           # Current framework version (semver; source of truth)

├── CHANGELOG.md      # Release notes (generated from Changelog: trailers)

├── Makefile          # Developer-only: validation + release targets for this repo

├── makefiles/        # Reusable Makefile modules — one per platform/feature (azure, gcp,

│                     #   gke, aws, docker, kube, terraform, vault, opa, gitlab, …)

├── scripts/          # Shell helpers added to PATH by help.mk (cloud login/logout, template

│                     #   rendering, Vault ops, GitLab/release tooling, confirm prompt, …)

├── envs/             # Environment config templates (otica/azure/gcp/aws/tf -env.mk)

├── helm-charts/      # Helm chart templates

├── tests/            # Validation harness (see `make validate`)

└── .gitlab/          # Changelog category config for the GitLab generator

```

The authoritative per-module/per-script reference is generated, not hand-maintained:

run `make help` for targets, `ls scripts/` for scripts, or see the

[Technical Reference](docs/OTICA_TECHNICAL_REFERENCE.md#module-reference).

## Examples

Examples live in their own repo tree, not in this framework checkout: