Initial commit: Immich client PoC for PS Vita

Scrollable chronological photo grid with full-screen viewer, fetching
previews from an Immich server via its REST API. Thumbnails stream in
on a background thread over a keep-alive connection. JPEG decoding is
done with libjpeg directly (vita2d's loader rejects Immich's
APP2-first JPEGs). JSON parsed with vendored jsmn (the vitasdk jansson
package is built as PIC, which vita-elf-create can't handle).

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

CMakeLists.txt

@@ -0,0 +1,50 @@
+cmake_minimum_required(VERSION 3.10)
+
+if(NOT DEFINED CMAKE_TOOLCHAIN_FILE)
+  if(DEFINED ENV{VITASDK})
+    set(CMAKE_TOOLCHAIN_FILE "$ENV{VITASDK}/share/vita.toolchain.cmake" CACHE PATH "toolchain file")
+  else()
+    message(FATAL_ERROR "Please define VITASDK to point to your SDK path!")
+  endif()
+endif()
+
+project(vitaImmich C)
+include("${VITASDK}/share/vita.cmake" REQUIRED)
+
+set(VITA_APP_NAME "Vita Immich")
+set(VITA_TITLEID  "VIMM00001")
+set(VITA_VERSION  "01.00")
+
+set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wall -O2")
+
+add_executable(${PROJECT_NAME}
+  src/main.c
+)
+
+target_link_libraries(${PROJECT_NAME}
+  vita2d
+  curl
+  ssl
+  crypto
+  zstd
+  freetype
+  png
+  jpeg
+  z
+  m
+  SceDisplay_stub
+  SceGxm_stub
+  SceSysmodule_stub
+  SceCtrl_stub
+  SceCommonDialog_stub
+  ScePgf_stub
+  SceAppMgr_stub
+  SceNet_stub
+  SceNetCtl_stub
+)
+
+vita_create_self(${PROJECT_NAME}.self ${PROJECT_NAME})
+vita_create_vpk(${PROJECT_NAME}.vpk ${VITA_TITLEID} ${PROJECT_NAME}.self
+  VERSION ${VITA_VERSION}
+  NAME ${VITA_APP_NAME}
+)