Reformat licensing information

LICENSE.md

@@ -1,23 +1,37 @@
-Licenses of media (sounds)
---------------------------
+# Licenses
+## Media
+### Sounds
+Sounds by Lone_Wolf are under the [CC0](https://creativecommons.org/publicdomain/zero/1.0/):
+* [`i3_tab.ogg`](sounds/i3_tab.ogg)
+* [`i3_click.ogg`](sounds/i3_click.ogg)
+* [`i3_cannot.ogg`](sounds/i3_cannot.ogg)
 
-Lone_Wolf (CC0):
-  i3_tab.ogg
-  i3_click.ogg
-  i3_cannot.ogg
+Sounds by MadPanCake are also under the CC0:
+* [`i3_craft.ogg`](sounds/i3_craft.ogg) — https://freesound.org/people/MadPanCake/sounds/567849/
 
-MadPanCake (CC0):
-  i3_craft.ogg (https://freesound.org/people/MadPanCake/sounds/567849/)
+```
+No Copyright
+
+The person who associated a work with this deed has dedicated the work to the
+public domain by waiving all of his or her rights to the work worldwide under
+copyright law, including all related and neighboring rights, to the extent
+allowed by law.
+
+You can copy, modify, distribute and perform the work, even for commercial
+purposes, all without asking permission.
+
+For more details:
+https://creativecommons.org/publicdomain/zero/1.0/
+```
 
 
 
-Licenses of media (textures)
-----------------------------
-
-paramat (CC BY-SA 3.0):
-  i3_arrow.png - derived from a texture by BlockMen (CC BY-SA 3.0)
-  i3_hotbar.png
+### Textures
+Textures by paramat are under the [CC BY-SA 3.0](https://creativecommons.org/licenses/by-sa/3.0/):
+* [`i3_arrow.png`](textures/i3_arrow.png) — derived from a texture by BlockMen (also CC BY-SA 3.0)
+* [`i3_hotbar.png`](textures/i3_hotbar.png)
 
+```
 You are free to:
 Share — copy and redistribute the material in any medium or format.
 Adapt — remix, transform, and build upon the material for any purpose, even commercially.
@@ -45,12 +59,15 @@ rights may limit how you use the material.
 
 For more details:
 http://creativecommons.org/licenses/by-sa/3.0/
+```
 
 
 
-License of source code #1 (MIT)
--------------------------------
+## Source code
+### MIT
+Code from i3 by Jean-Patrick Guerrero and i3 contributors (SmallJoker & anonymous) is under the MIT license, as follows:
 
+```
 The MIT License (MIT)
 
 Copyright (c) 2020-2023 Jean-Patrick Guerrero and contributors.
@@ -72,11 +89,14 @@ AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 THE SOFTWARE.
+```
 
 
 
-License of source code #2 (GPLv3)
----------------------------------
+### GPLv3
+Code for i4 by Jaidyn Ann is under the [GNU GPLv3](https://www.gnu.org/licenses/gpl-3.0.html), as follows:
+
+```
                     GNU GENERAL PUBLIC LICENSE
                        Version 3, 29 June 2007
 
@@ -751,4 +771,4 @@ may consider it more useful to permit linking proprietary applications with
 the library.  If this is what you want to do, use the GNU Lesser General
 Public License instead of this License.  But first, please read
 <https://www.gnu.org/licenses/why-not-lgpl.html>.
-
+```

README.md

@@ -57,12 +57,12 @@ value of the setting `display_density_factor` in your `minetest.conf`. Note that
 You can also use the font size slider in the inventory, settings window.
 
 
-## Source-code
+## Source code
 https://notabug.org/jadedctrl/i4
 
-Sounds are under the CC0, by Lone_Wolf & MadPanCake.  
-Textures are under the CC BY-SA 3.0, by paramat & BlockMen.  
-Source code from 2024 onward is under the GNU GPLv3, contributions by Jaidyn Ann (jadedctrl).  
-Source code pre-2024 is under the MIT license, by Jean-Patrick Guerrero; contributions by SmallJoker & anonymous.
+Sounds are under the [CC0](LICENSE.md#sounds), by Lone_Wolf & MadPanCake.  
+Textures are under the [CC BY-SA 3.0](LICENSE.md#textures), by paramat & BlockMen.  
+Source code for i4 is under the [GNU GPLv3](LICENSE.md#gplv3), with contributions by Jaidyn Ann `<jadedctrl@posteo.at>`.  
+Code from i3 is under the [MIT license](LICENSE.md#mit), and is by Jean-Patrick Guerrero (with contributions by SmallJoker & anonymous).
 
 See [./LICENSE](LICENSE) for details.