feat: add config command (#2892)

Signed-off-by: Keith Zantow <kzantow@gmail.com>

cmd/syft/internal/options/python.go

@@ -1,5 +1,18 @@
 package options
 
+import "github.com/anchore/clio"
+
 type pythonConfig struct {
 	GuessUnpinnedRequirements bool `json:"guess-unpinned-requirements" yaml:"guess-unpinned-requirements" mapstructure:"guess-unpinned-requirements"`
 }
+
+var _ interface {
+	clio.FieldDescriber
+} = (*pythonConfig)(nil)
+
+func (o *pythonConfig) DescribeFields(descriptions clio.FieldDescriptionSet) {
+	descriptions.Add(&o.GuessUnpinnedRequirements, `when running across entries in requirements.txt that do not specify a specific version 
+(e.g. "sqlalchemy >= 1.0.0, <= 2.0.0, != 3.0.0, <= 3.0.0"), attempt to guess what the version could
+be based on the version requirements specified (e.g. "1.0.0"). When enabled the lowest expressible version 
+when given an arbitrary constraint will be used (even if that version may not be available/published).`)
+}