Bug fixes and improvements (#1472)

* preorder, inorder, postorder -> pre-order, in-order, post-order

* Bug fixes

* Bug fixes

* Update what_is_dsa.md

* Sync zh and zh-hant versions

* Sync zh and zh-hant versions.

* Update performance_evaluation.md and time_complexity.md

* Add @khoaxuantu to the landing page.

* Sync zh and zh-hant versions

* Add @ khoaxuantu to the landing page of zh-hant and en versions.

* Sync zh and zh-hant versions.

* Small improvements

* @issue :  #1450 (#1453)

Fix writing "obsecure" to "obscure"

Co-authored-by: Gaya <kheliligaya@gmail.com>

* Update the definition of "adaptive sorting".

* Update n_queens_problem.md

* Sync zh, zh-hant, and en versions.

---------

Co-authored-by: Gaya-Khelili <50716339+Gaya-Khelili@users.noreply.github.com>
Co-authored-by: Gaya <kheliligaya@gmail.com>

zh-hant/docs/index.html

@@ -286,6 +286,14 @@
                         <br><sub>Zig, Rust</sub>
                     </a>
                 </div>
+                <div class="profile-cell">
+                    <a href="https://github.com/curtishd">
+                        <img class="profile-img" src="../assets/avatar/avatar_curtishd.jpg"
+                            alt="Reviewer: curtishd" />
+                        <br><b>curtishd</b>
+                        <br><sub>Kotlin</sub>
+                    </a>
+                </div>
                 <div class="profile-cell">
                     <a href="https://github.com/Gonglja">
                         <img class="profile-img" src="../assets/avatar/avatar_Gonglja.jpg" alt="Reviewer: Gonglja" />