ci: address multiple lint rules

[nickajacks1]

Description

Disable tagalign.
Tagalign requires awkward manual formatting and doesn't provide much value for readability.

Enable mirror.
Mirror warns against certain cases of useless conversion between string and []byte.

Enable perfsprint.
This linter encourages replacing several functions from the fmt package with faster alternatives. While fixing issues, I added a few exported error types rather than returning a naked errors.New().

Type of Change

• Code consistency (non-breaking change which improves code reliability and robustness)

Checklist

Before you submit your pull request, please make sure you meet these requirements:

• Conducted a self-review of the code and provided comments for complex or critical parts.
• Ensured that new and existing unit tests pass locally with the changes.
• Verified that any new dependencies are essential and have been agreed upon by the maintainers/community.

[nickajacks1]

Here's an example of what tagalign will enforce:

        type Request struct {
                QueryParam  string `query:"query_param"`
                HeaderParam string `header:"header_param"`
                BodyParam   string `form:"body_param"     json:"body_param" xml:"body_param"`
        }

^ it will complain if you don't have this exact number of spaces between the form and json tags for BodyParam.
It might increase readability in other scenarios, but it seemed more annoying than helpful.
Please feel free to push back if you disagree me here.

[sixcolors]

Unfortunately, go fmt won’t automatically align the tags, which makes it an annoying manual task. LGTM!

[gaby]

LGTM, i'm fine with disabling tagalign