fix(extensions-library): bulk manifest corrections across 19 services

[yasinBursali]

What

Bulk corrections to 19 service manifests fixing three categories of issues:
invalid gpu_backends values, malformed feature declarations, and missing
compose_file fields.

Why

Several manifests contain schema-invalid data that breaks validation:

• gpu_backends: [none] and gpu_backends: [] are not valid enum values
  (schema allows: amd, nvidia, apple, all)
• Features declared as dicts nested under service: instead of top-level
  arrays are invisible to consumers
• Missing compose_file prevents the compose resolver from locating service
  compose files

How

A. Remove invalid gpu_backends (8 service-level + 5 feature-level)
Services: aider, baserow, chromadb, crewai, gitea, label-studio, milvus,
open-interpreter, paperless-ngx, piper-audio, sillytavern, weaviate

B. Convert nested dict features → top-level array (7 services)
Services: bark, baserow, crewai, forge, frigate, paperless-ngx, weaviate
Each converted feature includes all schema-required fields (id, name,
description, icon, category, requirements, priority). GPU services include
gpu_backends on every feature matching the service-level declaration.

C. Add missing compose_file (4 services)
Services: anythingllm, flowise, langflow, librechat

Scope

All changes are within resources/dev/extensions-library/services/.

Testing

• All 33 manifests parse as valid YAML
• All converted features pass schema required-fields check against
  service-manifest.v1.json
• No remaining invalid gpu_backends values in any manifest
• No remaining nested dict features under service:
• No remaining services with compose.yaml missing compose_file
• No secrets in diff

Merging Order

This PR can be merged independently. If any of the following PRs merge first,
a minor rebase may be needed (they touch different sections of overlapping files):

• fix(extensions-library): rename bark env_vars 'name' to 'key' #547 (bark env_vars)
• fix(extensions-library): declare required API keys in weaviate and open-interpreter manifests #549 (weaviate + open-interpreter env_vars)
• fix(extensions-library): wait for healthy databases in paperless-ngx depends_on #537 (paperless-ngx depends_on)

🤖 Generated with Claude Code

[Lightheartdevs]

Reviewed: changes scoped to resources/dev/extensions-library only, no installer interaction. LGTM.

[Lightheartdevs]

Approved but has merge conflicts from other PRs that just landed. Please rebase against main and we'll merge. Thanks for the solid work on these! 🙏

The base branch was changed.

[yasinBursali]

Rebased on latest resources/dev (af07063). Resolved librechat manifest conflict — kept depends_on: [] from resources/dev (per merged PR #555), added missing compose_file: compose.yaml. All 19 files, 1 clean commit.

[yasinBursali]

Rebased on latest resources/dev (af07063). Resolved librechat conflict — kept depends_on: [] from resources/dev (per merged #555), added missing compose_file. This PR should merge before #566, #568, and #570 as they touch overlapping manifest files.