Implement CLI / Config with Cobra / Viper

[resoluteCoder]

The Problem

Currently Receptor uses a custom config parser that is tightly coupled as the parser not only reads the config file, but also initializes the relevant parts of the project. This custom parser is also not idiomatic, making it more difficult to understand the project.
The custom parser is difficult to extend, this can be seen in the reluctance to add more config fields, instead relying on environment variables.

The solution

This change proposes a backwards compatible way to move away from relying on the old cli and using cobra/viper to implement a version 2.

[sonarqubecloud]

Quality Gate passed

Issues
1 New issue
0 Accepted issues

Measures
0 Security Hotspots
No data about Coverage
0.0% Duplication on New Code

See analysis details on SonarCloud

[codecov]

Codecov Report

Attention: Patch coverage is 37.38318% with 67 lines in your changes missing coverage. Please review.

Project coverage is 43.04%. Comparing base (1cffdce) to head (10745fe).
Report is 74 commits behind head on devel.

Files with missing lines	Patch %	Lines
pkg/workceptor/kubernetes.go	53.84%	17 Missing and 1 partial ⚠️
pkg/backends/null.go	0.00%	13 Missing ⚠️
pkg/backends/udp.go	25.00%	5 Missing and 1 partial ⚠️
pkg/backends/websockets.go	25.00%	5 Missing and 1 partial ⚠️
pkg/certificates/cli.go	40.00%	5 Missing and 1 partial ⚠️
pkg/controlsvc/controlsvc.go	33.33%	3 Missing and 1 partial ⚠️
pkg/logger/logger.go	42.85%	3 Missing and 1 partial ⚠️
pkg/workceptor/python.go	33.33%	3 Missing and 1 partial ⚠️
pkg/backends/tcp.go	33.33%	1 Missing and 1 partial ⚠️
pkg/netceptor/tlsconfig.go	33.33%	1 Missing and 1 partial ⚠️
... and 1 more

@@            Coverage Diff             @@
##            devel    #1043      +/-   ##
==========================================
+ Coverage   42.47%   43.04%   +0.56%     
==========================================
  Files          43       47       +4     
  Lines        6775     7430     +655     
==========================================
+ Hits         2878     3198     +320     
- Misses       3666     3994     +328     
- Partials      231      238       +7     

Files with missing lines	Coverage Δ
pkg/backends/tcp.go	3.15% <33.33%> (+0.48%)	⬆️
pkg/netceptor/tlsconfig.go	60.31% <33.33%> (-0.66%)	⬇️
pkg/workceptor/command.go	49.61% <50.00%> (-0.19%)	⬇️
pkg/controlsvc/controlsvc.go	77.89% <33.33%> (-0.48%)	⬇️
pkg/logger/logger.go	20.30% <42.85%> (+0.30%)	⬆️
pkg/workceptor/python.go	10.81% <33.33%> (+1.98%)	⬆️
pkg/backends/udp.go	2.87% <25.00%> (+0.44%)	⬆️
pkg/backends/websockets.go	55.08% <25.00%> (-1.14%)	⬇️
pkg/certificates/cli.go	29.93% <40.00%> (+0.07%)	⬆️
pkg/backends/null.go	0.00% <0.00%> (ø)
... and 1 more

... and 6 files with indirect coverage changes

Components	Coverage Δ
Go	42.51% <37.38%> (+0.03%)	⬆️
Receptorctl	49.31% <ø> (∅)

[AaronH88]

Overall looking good,

Can I get some example of the trace option please as I cant get it working locally 😄

[shanemcd]

Please add a description to this PR or create an associated issue with more information. For a PR this big / important, we should summarize what we're doing here and the approach we're taking. Here's a couple examples for you to follow:

• Always clean up timed out connections #896
• Work results stream sometimes exits before all data has been received #597
• Always clean up timed out connections #896

[AaronH88]

Overall looking good,

Can I get some example of the trace option please as I cant get it working locally 😄

Trace seems to be strange even on the original and dosent do what I expected at all.
Lets create something in our backlog for using a different and better logging tool where tracing can be turned off and on at run time.

Feel free to ignore this trace comment and this PR looks OK to me 😄

[AaronH88]

lgtm,

Can we resolve the conflicts then we are good to merge 😄

[sonarqubecloud]

Quality Gate passed

Issues
4 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarCloud