Add --config, --help, and --version flags to edit-docs

- Implement --config (-c) flag to allow custom configuration file paths.
- Add --help (-h) flag to display tool usage and available options.
- Add --version (-v) flag to display the current Trilium version.
- Update electron-start.mts to correctly pass command-line arguments to Electron.
- Synchronize edit-docs version with the root package.json via update-version.ts.
- Resolve config paths relative to the configuration file's directory.

This makes edit-docs more robust and easier to use from external projects
and immutable environments like Nix.

scripts/update-version.ts

@@ -26,7 +26,7 @@ function getVersion(packageJsonPath: string) {
 function main() {
     const version = getVersion(join(__dirname, "..", "package.json"));
 
-    for (const appName of ["server", "client", "desktop"]) {
+    for (const appName of ["server", "client", "desktop", "edit-docs"]) {
         patchPackageJson(join(__dirname, "..", "apps", appName, "package.json"), version);
     }