added icon theme la-capitaine with personal changes

.local/share/icons/la-capitaine/Thanks.md

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+### Thanks!
+Thank you so much to the generous people who are helping to support this
+project. You guys inspire me to be my very best, and keep my development
+on going. Cheers all!
+
+#### Significant contibutors
+This is a list of people who have supported me with significant _code_
+contributions. Cheers to them! :computer:
+
+ * Andreas K. ([@DarkknightAK](https://github.com/darkknightak))
+    - added proper support for the KDE Plasma desktop environment
+ * [@RaitaroH](https://github.com/RaitaroH)
+    - recoloured many many icons to make the dark variant of
+      La Capitaine possible
+ * [@demoy](https://github.com/demoy)
+   - Helped hunt down and destroy problems with some action icons that
+     weren't being detected by my SVG renderer
+ * Sergey Artemov ([@firefoxic](https://github.com/firefoxic))
+   - Assisted with reducing overall size of project
+ * [@now-im](https://github.com/now-im)
+   - Added KDE style attributes to monochrome icons, such that the theme
+     respects the desktop colourscheme
+   - Contributes new icons regularly!
+ * [@Riotism](https://github.com/Riotism)
+   - Contributes new icons, and audits design!
+   - Has been a huge help finding compatibility issues
+
+#### Significant donors
+This is a list of people who have supported me with significant
+donations through [Paypal](https://paypal.me/keeferrourke) or
+[Patreon](https://www.patreon.com/krourke). Cheers to them! :grin:
+
+ * Anonymous donations from Pling GmbH
+