start adding auto-registering of addon sections in the Plugin entity

src/core/entities/Plugin.js

@@ -7,9 +7,9 @@ import { createElement } from '@vizality/util/dom';
 import { Directories } from '@vizality/constants';
 import { isArray } from '@vizality/util/array';
 import { debounce } from 'lodash';
-import { join, sep } from 'path';
+import { join, sep, extname } from 'path';
 import { watch } from 'chokidar';
-import { existsSync } from 'fs';
+import { existsSync, readFileSync } from 'fs';
 
 import Updatable from './Updatable';
 
@@ -314,6 +314,7 @@ export default class Plugin extends Updatable {
          * 
          */
         await this._registerSettings();
+        await this._registerSections();
       } else {
         this.warn(`${toTitleCase(this.type)} has no "start" method!`);
       }
@@ -370,6 +371,53 @@ export default class Plugin extends Updatable {
     }
   }
 
+  /**
+   * 
+   * @private
+   */
+  async _registerSections () {
+    try {
+      /**
+       * 
+       */
+      let changelogPath;
+      if (this.type !== 'builtin') {
+        if (!this.sections.changelog) {
+          if (this.manifest?.sections?.changelog) {
+            if (existsSync(join(this.path, this.manifest.sections.changelog))) {
+              changelogPath = join(this.path, this.manifest.sections.changelog);
+            }
+          } else if (existsSync(join(this.path, 'CHANGELOG.md'))) {
+            changelogPath = join(this.path, 'CHANGELOG.md');
+          } else if (existsSync(join(this.path, 'CHANGELOG'))) {
+            changelogPath = join(this.path, 'CHANGELOG');
+          }
+        }
+        if (changelogPath) {
+          this.sections.changelog = readFileSync(changelogPath, 'utf8');
+        }
+
+        let readmePath;
+        if (!this.sections.overview) {
+          if (this.manifest?.sections?.overview) {
+            if (existsSync(join(this.path, this.manifest.sections.overview))) {
+              readmePath = join(this.path, this.manifest.sections.overview);
+            }
+          } else if (existsSync(join(this.path, 'README.md'))) {
+            readmePath = join(this.path, 'README.md');
+          } else if (existsSync(join(this.path, 'README'))) {
+            readmePath = join(this.path, 'README');
+          }
+        }
+        if (readmePath) {
+          this.sections.overview = readFileSync(readmePath, 'utf8');
+        }
+      }
+    } catch (err) {
+      return this.error(err);
+    }
+  }
+
   /**
    * 
    * @private