feat(policy-devel): enhance lint error output

[Piskoo]

This PR add additional information to lint errors.
Lint errors now include:

• rule id
• documentation resources

Before

<file>:<line>: <errorMsg>

After

<file>:<line>: [<ruleName>] <errorMsg> - <docLinks>

Example

+---+---------------------------------------------------------------------------------------------------------------------------------------+
| # | ISSUE                                                                                                                                 |
+---+---------------------------------------------------------------------------------------------------------------------------------------+
| 1 | policy-script.rego:129: [help_text]: Call to print or trace function - https://docs.styra.com/regal/rules/testing/print-or-trace-call |
| 2 | testo2.rego:50: [not_fine]: Prefer `if` over boolean assignment - https://docs.styra.com/regal/rules/idiomatic/boolean-assignment     |
| 3 | testo2.rego:46: [fine]: Avoid double negatives - https://docs.styra.com/regal/rules/style/double-negative                             |
| 4 | testo2.rego:41: [violations]: Call to print or trace function - https://docs.styra.com/regal/rules/testing/print-or-trace-call        |
+---+---------------------------------------------------------------------------------------------------------------------------------------+

Closes #2377

[migmartri]

thanks, can you put an example?

is the link added on each rule? overall?

[Piskoo]

Updated with example.
Link is added to regal errors (opa doesn't provide them) it's attached to each lint error.

[migmartri]

nice