update Services schema to allow lossless import/export

[michielbdejong]

The current Services schema cannot hold all information held by the Services API spec:

string fields to add:

• id -> add oldId
• keywords, related -> add

already have:

• name -> lowercase to name
• urls -> use url (there are actually no services in the db with multiple urls, that's already split)
• tosdr.rated -> use grade, already a string

don't need:

• type -> restrict to 'service'
• fulltos -> deprecate (link to tosback!)
• parent, license -> deprecate
• dataexport, freesoftware -> make point if yes
• meta.spec-version -> always 1.1
• alexa -> check on the fly

[michielbdejong]

Calling oldId 'slug' to avoid camelCase.

[michielbdejong]

Should make ../tosdr-build/src/services same format as old_db/services/

[evilcel3ri]

keywords, related -> add

Is that needed ? What kind of keywords would be used ? "Chat", "email", etc ?

[michielbdejong]

Yes, otherwise e.g. https://tosdr.org/#search=shop would stop working