fix: restore runtime scaffolding and replace bundled media with hosted thumbnails

[Cod3Uchiha]

Motivation

• The project lacked essential runtime scaffolding and small databases which prevented main.js and Tkm.js from finding expected helpers and data at startup.
• Bundled binary JPEG assets caused repository/export flows to fail in environments that reject binaries, so message payloads should not depend on local image files.
• The integrity checker should not hard-fail startup in constrained environments, so make its loading optional and non-blocking.

Description

• Restored runtime scaffolding and helpers by adding all/module.js, all/global.js, all/function.js, all/place.js, all/myfunc.js, and all/converter.js, and created small DB placeholders under all/database/*.json and list/teksjpm.js.
• Hardened main.js to try/catch loading of tkm-integrity-checker and fall back to a no-op checkFileIntegrity that logs a warning instead of terminating.
• Removed binary media files media/warning.jpg and media/ownermode.jpg, replaced fs.readFileSync("./media/*.jpg") usages with hosted thumbnailUrl links in main.js and Tkm.js, and added media/Readme.md as a placeholder.
• Minor project entry fixes: updated package.json to use main.js as the entry and adjusted start/debug scripts, and added safe stubs (conversion and network helpers) so the codebase can run basic checks in constrained environments.

Testing

• Ran syntax checks with node --check main.js, node --check Tkm.js, node --check index.js, and node --check settings.js, and they all passed.
• Executed npm run start which reached the bootstrap but failed at runtime due to missing installed dependencies (for example chalk), so full runtime start could not be completed in this environment.
• Verified message payload changes by static inspection and by running node --check to ensure no syntax regressions from the thumbnailUrl replacements and other edits.

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Codex Task