Refactor build tasks and config file

Changed:
- Renamed 'mconfig.json' to 'loconfig.json'.
- Renamed 'concat.js' to 'concats.js' to represent flexible functionality.
- loconfig.json: Base paths are nested under "paths".
- loconfig.json: Paths for tasks are nested under "tasks".
- Refactored each task to process corresponding entries under "tasks" in 'loconfig.json'.
- watch.js: Changed concats watch to use task's includes.

Added:
- tiny-glob v0.2.9
- Utility 'glob.js' to use dynamic imports to fetch an available glob function from node modules.
- Utility 'template.js' to provide a function to render template tags (`{% ... %}`) in tasks.
- concats.js: Support for concatenating groupes of files.
- scripts.js: Support for ESBuild's "outdir" option.

build/utils/glob.js

@@ -0,0 +1,75 @@
+/**
+ * @file Retrieve the first available glob library.
+ *
+ * Note that options vary between libraries.
+ *
+ * Candidates:
+ * - {@link https://npmjs.com/package/tiny-glob tiny-glob}
+ * - {@link https://npmjs.com/package/globby}
+ * - {@link https://npmjs.com/package/fast-glob fast-glob}
+ * - {@link https://npmjs.com/package/glob glob}
+ */
+
+import { promisify } from 'node:util';
+
+const modules = [
+    'tiny-glob',
+    'globby',
+    'fast-glob',
+    'glob',
+];
+
+var glob;
+
+for (let name of modules) {
+    try {
+        glob = await import(name);
+        glob = glob.default;
+
+        /**
+         * Wrap the function to ensure
+         * a common pattern.
+         */
+        switch (name) {
+            case 'tiny-glob':
+                glob = createArrayableGlob(glob, {
+                    filesOnly: true
+                });
+                break;
+
+            case 'glob':
+                glob = promisify(glob);
+                break;
+        }
+
+        break; // loop
+    } catch (err) {
+        // swallow this error; skip to the next candidate.
+    }
+}
+
+if (!glob) {
+    throw new TypeError(
+        `No glob library was found, expected one of: ${modules.join(', ')}`
+    );
+}
+
+export default glob;
+
+/**
+ * Creates a wrapper function for the glob function
+ * to provide support for arrays of patterns.
+ *
+ * @param  {function} glob    - The glob function.
+ * @param  {object}   options - The glob options.
+ * @return {Promise}
+ */
+function createArrayableGlob(glob, options) {
+    return (patterns, options) => {
+        const globs = patterns.map((pattern) => glob(pattern, options));
+
+        return Promise.all(globs).then((files) => {
+            return [].concat.apply([], files);
+        });
+    };
+}