Add search functions

[khoroshevskyi]

2 functions, each do 4 queries: 1:

• count namespace

• list namespace

• count search namespace

• list search namespace 2:

• count search project within namespace

• list search project within namespace

• count project within namespace

• list project within namespace endpoints produce:

  count: 2500
  offset: 0
  limit: 100
  items:
  - one
  - two
  - three

queries take:

offset=x
limit=y