fix(parser): don't anchor comment directives on comment lines

The @Description/@Interactive/@InjectSSHAgent/@NoArtifactsToSource
injection used /\w:/ to find the job to attach a pending directive to.
That regex also matches a colon inside a comment line, so a multi-line
'# @description ...: ...' block (or any comment containing 'word:')
was treated as the anchor. The 2-space 'gclDescription:' line then got
spliced in after a comment, landing on the previous job — producing a
duplicate mapping key and the 'duplicated mapping key detected! Values
will be overwritten!' warning.

Skip comment lines entirely when scanning for the anchor, and only
anchor on a real top-level key (/^[\w.$-]+:/) so indented keys and
comments can never be mistaken for a job.

Author: firecow

src/parser.ts

@@ -297,12 +297,16 @@ export class Parser {
         let index = 0;
         if (expandVariables) {
             for (const line of fileSplit) {
-                interactiveMatch = interactiveMatch ?? /#\s?@\s?[Ii]nteractive/.exec(line);
-                injectSSHAgent = injectSSHAgent ?? /#\s?@\s?[Ii]njectSSHAgent/.exec(line);
-                noArtifactsToSourceMatch = noArtifactsToSourceMatch ?? /#\s?@\s?NoArtifactsToSource/i.exec(line);
-                descriptionMatch = descriptionMatch ?? /#\s?@\s?[Dd]escription (?<description>.*)/.exec(line);
+                if (/^\s*#/.test(line)) {
+                    interactiveMatch = interactiveMatch ?? /#\s?@\s?[Ii]nteractive/.exec(line);
+                    injectSSHAgent = injectSSHAgent ?? /#\s?@\s?[Ii]njectSSHAgent/.exec(line);
+                    noArtifactsToSourceMatch = noArtifactsToSourceMatch ?? /#\s?@\s?NoArtifactsToSource/i.exec(line);
+                    descriptionMatch = descriptionMatch ?? /#\s?@\s?[Dd]escription (?<description>.*)/.exec(line);
+                    index++;
+                    continue;
+                }
 
-                const jobMatch = /\w:/.exec(line);
+                const jobMatch = /^[\w.$-]+:/.exec(line);
                 if (jobMatch && (interactiveMatch || descriptionMatch || injectSSHAgent || noArtifactsToSourceMatch)) {
                     if (interactiveMatch) {
                         fileSplitClone.splice(index + 1, 0, "  gclInteractive: true");