Major enhancements to documentation

* Closes #11467 - Describe default search fields
* Closes #11468 - Fix lock database shortcut
* Closes #8259 - Add a note about 1Password OPVault specifics
* Closes #9794 - Add section anchors for easy linking
* Closes #10316 - Show how to setup managed Edge on macOS
* Closes #7805 - Document entry url handling
* Closes #9143 - Document database merge behavior
* Closes #10876 - Correct wording in browser and passkey sections

Update outdated images of the user interface. Improve wording and flow of entire documentation. Fill in missing pieces based on user feedback.

Add mention about URL wildcards

share/demo.key

@@ -1 +0,0 @@
-secret

share/demo_readme.md

@@ -0,0 +1,3 @@
+This is a demo database to showcase some of the features of KeePassXC
+
+The password to unlock demo.kdbx is: secret

share/linux/org.keepassxc.KeePassXC.appdata.xml

@@ -229,7 +229,7 @@
                     <li>Browser: Revert code causing connection problems [#8665]</li>
                     <li>Browser: Fix socket file symbolic link on Linux [#8656]</li>
                     <li>Flatpak: Fix launching browser proxy service [#8680]</li>
-                    <li>SSH Agent: Fix paegent support on Windows [#8619]</li>
+                    <li>SSH Agent: Fix pageant support on Windows [#8619]</li>
                 </ul>
             </description>
         </release>
@@ -1099,7 +1099,7 @@
                     <li>Compare window title to entry URLs [#556]</li>
                     <li>Implemented inline error messages [#162]</li>
                     <li>Ignore group expansion and other minor changes when making database "dirty" [#464]</li>
-                    <li>Updated license and copyright information on souce files [#632]</li>
+                    <li>Updated license and copyright information on source files [#632]</li>
                     <li>Added contributors list to about dialog [#629]</li>
                 </ul>
             </description>