feat: CLI commands for secondary indexes

[islamaliev]

Relevant issue(s)

Resolves #1553

Description

Adds following CLI commands:

• client index create that creates a new index on an existing collection
• client index drop that drop a named indexes on a collection
• client index list that lists all existing indexes in db or indexes for a specific collection

Tasks

• I made sure the code is well commented, particularly hard-to-understand areas.
• I made sure the repository-held documentation is changed accordingly.
• I made sure the pull request title adheres to the conventional commit style (the subset used in the project can be found in tools/configs/chglog/config.yml).
• I made sure to discuss its limitations such as threats to validity, vulnerability to mistake and misuse, robustness to invalidation of assumptions, resource requirements, ...

How has this been tested?

Unit test, integration tests, manual tests

Specify the platform(s) on which this was tested:

• MacOS

[codecov]

Codecov Report

Patch coverage: 82.64% and project coverage change: +0.03 🎉

Comparison is base (5f4beb9) 73.64% compared to head (8b1cea3) 73.67%.

@@             Coverage Diff             @@
##           develop    #1595      +/-   ##
===========================================
+ Coverage    73.64%   73.67%   +0.03%     
===========================================
  Files          188      193       +5     
  Lines        19608    19953     +345     
===========================================
+ Hits         14439    14699     +260     
- Misses        4104     4160      +56     
- Partials      1065     1094      +29     

Flag	Coverage Δ
all-tests	73.67% <82.64%> (+0.03%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
cli/errors.go	14.29% <0.00%> (+6.59%)	⬆️
db/txn_db.go	50.85% <50.00%> (-0.05%)	⬇️
cli/index_drop.go	70.83% <70.83%> (ø)
logging/config.go	95.83% <75.00%> (ø)
cli/index_list.go	75.41% <75.41%> (ø)
cli/index_create.go	76.00% <76.00%> (ø)
api/http/handlerfuncs_index.go	100.00% <100.00%> (ø)
api/http/router.go	100.00% <100.00%> (ø)
cli/cli.go	72.55% <100.00%> (+2.02%)	⬆️
cli/index.go	100.00% <100.00%> (ø)
... and 2 more

... and 7 files with indirect coverage changes

---

Continue to review full report in Codecov by Sentry.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 5f4beb9...8b1cea3. Read the comment docs.

[fredcarle]

Good work Islam! I do have a few things that I'd like to see changed and discussed as you'll see bellow.

[fredcarle]

Good improvements Islam. I have a few more things before I approve and then we should be good to go. I'm sorry if some of the comments are repetitive. I used some copy pasting to save me time :)

[shahzadlone]

Some nitpicks about formatting, :P might be considered personal pref though. One minor todo.

Approving as all else LGTM =)

[fredcarle]

LGTM. Note that I do agree with Shahzad that changing the formatting of the command flags would help readability.