docs: add Feb–Apr 2026 release notes

[pru55e11]

Summary

• Adds customer-facing release notes for February, March, and April 2026
• Source: #app-builder-releases Slack channel
• Skipped internal-only updates (oclif v2 dependency upgrades, deploy-service HTTP error formatting, eslint-config internal tooling)

Changes included

April 2026

• aio-cli-plugin-console@5.2.0 — non-interactive project create and workspace create commands for scripted/agentic workflows

March 2026

• aio-lib-ims-oauth@6.1.0 — configurable local login port via AIO_IMS_LOCAL_LOGIN_PORT (enables Docker container login)
• aio-cli@11.0.2 — fixes TypeError: opts.getPluginsList is not a function when installing plugins
• aio-cli-lib-app-config@4.2.0 — aligns app.config.yaml schema validation with OpenWhisk spec

February 2026

• Activation Logs UI in Developer Console (view/search action logs without CLI)
• CDN Management in Developer Console (view URL, toggle caching, invalidate cache)
• aio-lib-web@7.1.1 — fixes Windows nested static file deployment bug
• aio-cli-plugin-app@14.4.2 — fixes aio app install fallback for out-of-sync lockfiles
• aio-cli-plugin-console@5.1.0 — fixes require() of ES Module error
• aio-cli-plugin-runtime@8.1.0 — fixes rt alias help display