feat(analyzer): update AnalyzedCommit to add flexibility in parsing a message

This provides flexibility of parsing and rendering structured messages
with more detail in the changelog and helps extract metadata from the 
message. The new structure can be used to split a message in multiple 
blocks (e.g. footer)

internal/shared/shared.go

@@ -37,13 +37,22 @@ type ChangelogTemplateConfig struct {
 type AnalyzedCommit struct {
 	Commit                      Commit `yaml:"commit"`
 	ParsedMessage               string `yaml:"parsedMessage"`
-	Scope                       Scope  `yaml:"scope"`
 	ParsedBreakingChangeMessage string `yaml:"parsedBreakingChangeMessage"`
 	Tag                         string `yaml:"tag"`
 	TagString                   string `yaml:"tagString"`
+	Scope                       Scope  `yaml:"scope"`
+	Subject                     string `yaml:"subject"`
+	MessageBlocks			    map[string][]MessageBlock `yaml:"messageBlocks"`
+	IsBreaking                  bool   `yaml:"isBreaking"`
 	Print                       bool   `yaml:"print"`
 }
 
+// MessageBlock represents a block in the body section of a commit message
+type MessageBlock struct {
+	Label string `yaml:"label""`
+	Content string `yaml:"content"`
+}
+
 //Scope of the commit, like feat, fix,..
 type Scope string