WebGL, iOS GLES and desktop OpenGL version options; project defines for make builds and VS Debug

[danoli3]

Summary

• WebGL version dropdown (Default / WebGL 1 / WebGL 2) when the emscripten template is selected -> OF_WEBGL_VERSION=1|2
• OpenGL ES version dropdown (Default / ES 1.1 / ES 2.0 / ES 3.0) for ios / macos -> OF_GLES_VERSION=1|2|3
• OpenGL version dropdown (Default / 3.1 ... 4.5, 4.6) for desktop platforms (osx, vs, msys2, linux*, vscode) -> OF_GL_VERSION_MAJOR / OF_GL_VERSION_MINOR. Same versions as the gl3.1-gl4.5 templates without needing a separate template; options above 4.1 are hidden when osx is selected (Apple's OpenGL stops at 4.1), 4.6 available for Windows / Linux
• All three Advanced-only like the renderer field, and only add a define when not left on Default
• Project defines now reach make builds: addProjectDefine() also records the define and save() writes PROJECT_DEFINES = ... into config.make (replacing the template's # PROJECT_DEFINES = line). Before this, -D / custom defines were dropped for make / VS Code projects since their addDefine() is a no-op
• VS: project defines (-D, custom defines, renderer + GL options) now go to Debug and Release - addProjectDefine is virtual and visualStudioProject adds to both configs, same as addon defines. Before, they were Release-only so a Debug build silently ignored them
• Strings for all 9 locales

Notes

• Needs GL version defines for main templates / PG openFrameworks#8573 for the defines to do anything - OF reads OF_WEBGL_VERSION from PROJECT_DEFINES for the emscripten link flags + context version, and OF_GLES_VERSION in the ios + tvOS template main.mm, and OF_GL_VERSION_MAJOR/MINOR in the desktop template main.cpp (settings.setGLVersion). Without it the defines are harmless
• Updating a project with no defines still resets config.make from the template (existing behaviour, a backup is written), so PROJECT_DEFINES needs re-selecting on update

Test plan

• Built commandLine (xcodebuild, macOS 12 target) and generated against a real OF checkout:
  • -posx -temscripten -DOF_WEBGL_VERSION=1,MY_FLAG -> PROJECT_DEFINES = OF_WEBGL_VERSION=1 MY_FLAG in config.make
  • re-run with -DOF_WEBGL_VERSION=2 replaces it (single line)
  • -pios -DOF_GLES_VERSION=3 -> OF_GLES_VERSION=3 in both Xcode build configs
  • -posx with no defines -> config.make unchanged
  • -pvs -DOF_GL_VERSION_MAJOR=4,OF_GL_VERSION_MINOR=6 -> both the Debug and Release ItemDefinitionGroups (per-arch groups have no own PreprocessorDefinitions, so x64 / ARM64 / ARM64EC all inherit)
  • -posx -DOF_GL_VERSION_MAJOR=4,OF_GL_VERSION_MINOR=1 -> both Xcode build configs
• Live Electron: WebGL field shows only with the emscripten template, GLES only for ios, OpenGL for vs (to 4.6) / osx (capped at 4.1, a 4.6 pick resets to Default), all hidden with Advanced off