libSceContentSearch technical debt

libSceContentSearch searches a content library that is empty on the host, as nothing is exported to it. The signatures follow AlexAltea/orbital and SharpProspero, which agree; the filter and sort layouts and enums, the limit of 92 rows, 0x809D100A for a larger limit and 0x809D1001 before sceContentSearchInit are SharpProspero's. sceContentSearchGetNumOfContent, sceContentSearchGetTotalContentSize and sceContentSearchSearchContent report 0 rows and 0 bytes without writing a content row, and the update id they and sceContentSearchGetContentLastUpdateId report is always 0; no reference gives the console's update id for a library that never changed. Filters and sort conditions are only checked against SharpProspero's enums, and a null output, a null array with a non-zero length, an empty column set, a null filter value or an unknown enum value throws, as the console's errors for them are unknown; a null column set with length 0 is taken as no filter. sceContentSearchOpenMetadata and sceContentSearchOpenMetadataByContentId throw, as no reference gives the error for a path or content id that is not in the library, so no metadata id is ever handed out and sceContentSearchCloseMetadata, sceContentSearchGetMetadataFieldInfo and sceContentSearchGetMetadataValue throw. Every title is taken to hold the content-search permission (SharpProspero's 0x809D1013 is never returned). The order of the initialization, argument and limit checks is unverified