Adds CI/CD integration docs

[cesar-rodriguez]

Adding a page to the documentation with how to integrate Terrascan with GitHub and GitLab CI.

[codecov]

Codecov Report

Merging #452 (df42ce9) into master (c57bb06) will increase coverage by 1.96%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master     #452      +/-   ##
==========================================
+ Coverage   73.39%   75.35%   +1.96%     
==========================================
  Files          86       88       +2     
  Lines        1962     2232     +270     
==========================================
+ Hits         1440     1682     +242     
- Misses        388      403      +15     
- Partials      134      147      +13     

Impacted Files	Coverage Δ
pkg/runtime/executor.go	91.95% <0.00%> (-2.05%)	⬇️
pkg/config/config-reader.go	85.00% <0.00%> (ø)
pkg/runtime/rules.go	100.00% <0.00%> (ø)
pkg/cli/run.go	93.00% <0.00%> (+1.69%)	⬆️
pkg/cli/scan.go	77.77% <0.00%> (+2.77%)	⬆️
pkg/config/global.go	80.39% <0.00%> (+2.89%)	⬆️
pkg/http-server/file-scan.go	75.90% <0.00%> (+8.04%)	⬆️
pkg/notifications/notifiers.go	92.30% <0.00%> (+8.09%)	⬆️
pkg/notifications/webhook/webhook.go	32.43% <0.00%> (+8.90%)	⬆️
pkg/http-server/remote-repo.go	72.15% <0.00%> (+9.18%)	⬆️
... and 1 more

[sonarcloud]

Kudos, SonarCloud Quality Gate passed!

0 Bugs
0 Vulnerabilities
0 Security Hotspots
0 Code Smells

No Coverage information
No Duplication information

[acc-jon]

Looks good, thanks