refactor(v2)!: restructure repo into services/ + features/, bump module to /v2

[NitinKumar004]

Why

The repository root had 43 top-level folders — nearly all of them public Go packages. For a published module, the directory layout is the public API (import path = directory path), so this reorg is a breaking change and ships as a new major version: the module path becomes github.com/stackshy/cloudemu/v2.

New layout (root: 43 → 9)

Organized by architectural role, so future additions have one predictable home:

github.com/stackshy/cloudemu/v2
├── cloudemu.go, doc.go        facade: New{AWS,Azure,GCP}
├── config/  errors/           foundational
├── services/<name>/           a cloud service = portable API + driver/  (add a service here)
├── providers/{aws,azure,gcp}/ in-memory backends
├── server/{aws,azure,gcp,wire}/  SDK-compat HTTP servers
├── features/<name>/           chaos, recorder, metrics, inject, ratelimit, topology
├── internal/                  private helpers (memstore, idgen, pagination, statemachine)
└── docs/ examples/ .github/

• 28 service packages → services/ (incl. kubernetes, cost, resourcediscovery — they emulate real cloud services).
• 6 cross-cutting features → features/ (topology is cloudemu-only analysis, hence a feature, not a service).
• pagination, statemachine → internal/ (private helpers, never part of the public API).

Migration for users

github.com/stackshy/cloudemu            → github.com/stackshy/cloudemu/v2
github.com/stackshy/cloudemu/storage    → github.com/stackshy/cloudemu/v2/services/storage
github.com/stackshy/cloudemu/chaos      → github.com/stackshy/cloudemu/v2/features/chaos
github.com/stackshy/cloudemu/server/aws → github.com/stackshy/cloudemu/v2/server/aws   (server/providers/config/errors keep their place, just gain /v2)

Commits

Split file-wise (~49 commits): one per moved package, then per-tree import updates (providers, server, config/errors, examples, internal), then docs.

Verification

go build ./..., go vet ./..., and the full go test ./... suite all pass on the restructured tree — nothing broke functionally. README, in-repo docs/*.md, doc.go, and badges are updated to the v2 paths (repo/logo URLs kept).

The docs site (cloudemu-docs) is updated in a separate PR.