Normalize and promote legacy Adobe XMP children

Add normalization and promotion for legacy Adobe structured XMP child prefixes and nested grandchild prefixes. Introduces helpers to recognize stRef/stDim/stJob/stFnt/stMfs/stVer/stEvt and xmpG components, map malformed Adobe child paths to canonical sType prefixes, and resolve existing structured/nested components to portable names. Treat xmpDM:Tracks as a Bag and canonicalize its structured children (e.g. trackName, markers/name) while avoiding duplicate promotion when explicit portable entries exist. Update xmp_dump header docs and add unit tests covering promotion of legacy prefixes and canonicalization of xmpDM Tracks.

Author: ssh4net

src/include/openmeta/xmp_dump.h

@@ -102,6 +102,8 @@ struct XmpPortableOptions final {
     /// `beatSpliceParams/riseInTimeDuration/scale`,
     /// `markers/cuePointParams/key`,
     /// `contributedMedia[1]/duration/scale`,
+    /// `Tracks[1]/trackName`,
+    /// `Tracks[1]/markers/name`,
     /// `resampleParams/quality`,
     /// `startTimecode/timeValue`,
     /// `timeScaleParams/quality`,
@@ -121,6 +123,10 @@ struct XmpPortableOptions final {
     /// `Creator[1]/Name` and `Creator[1]/Role` are also promoted into the
     /// canonical `lang-alt` or indexed shapes when no explicit canonical
     /// child entries already exist.
+    /// Known malformed Adobe structured child paths like
+    /// `DerivedFrom/documentID`, `JobRef[1]/id`,
+    /// `Manifest[1]/reference/filePath`, and `Versions[1]/event/action`
+    /// are likewise promoted into their canonical qualified child prefixes.
     /// The same bounded promotion applies to known second-level standard
     /// shapes like `CreatorContactInfo/CiAdrRegion/ProvinceName` and
     /// `CreatorContactInfo/CiAdrRegion/ProvinceCode`.