feat: add named score type

[JoanFM]

Changes introduced
Add NamedScore type and set a property for document.

Useful to provide expected score values for groundtruth specially for NDCGEvaluation

Fixes #1431

[bwanglzu]

why not from collections import namedtuple and created a new class?

from collections import namedtuple

NamedScore = namedtuple('NamedScore', ['op_name', 'score'])

and you get all these getters setters for free (as far as I know you didn't use description or ref_id)

[JoanFM]

why not from collections import namedtuple and created a new class?

from collections import namedtuple

NamedScore = namedtuple('NamedScore', ['op_name', 'score'])

and you get all these getters setters for free (as far as I know you didn't use description or ref_id

I like the idea; however my idea is to have a baseline to eventually support everything the Proto class accepts

[github-actions]

Latency summary

Current PR yields:

• 😶 index QPS at 1601, delta to last 3 avg.: +4%
• 😶 query QPS at 25, delta to last 3 avg.: +0%

Breakdown

Version	Index QPS	Query QPS
current	1601	25
0.8.11	1540	26
0.8.10	1536	25
0.8.9	1539	23

Backed by latency-tracking. Further commits will update this comment.

[codecov]

Codecov Report

Merging #1430 (4f2f1ca) into master (1645a19) will increase coverage by 0.19%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master    #1430      +/-   ##
==========================================
+ Coverage   84.07%   84.26%   +0.19%     
==========================================
  Files         106      106              
  Lines        6102     6158      +56     
==========================================
+ Hits         5130     5189      +59     
+ Misses        972      969       -3     

Impacted Files	Coverage Δ
jina/helloworld/__init__.py	100.00% <ø> (ø)
jina/drivers/evaluate.py	98.21% <100.00%> (+0.10%)	⬆️
jina/drivers/rank.py	97.33% <100.00%> (-0.04%)	⬇️
jina/drivers/search.py	94.64% <100.00%> (ø)
jina/excepts.py	100.00% <100.00%> (ø)
jina/helloworld/helper.py	90.52% <100.00%> (-0.57%)	⬇️
jina/logging/profile.py	68.33% <0.00%> (-0.58%)	⬇️
jina/drivers/craft.py	100.00% <0.00%> (ø)
jina/types/ndarray/generic.py	100.00% <0.00%> (ø)
jina/executors/indexers/cache.py	100.00% <0.00%> (ø)
... and 19 more

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[github-actions]

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