FEAT: Added activate script, Cleaned up dotfiles folder

- hidden files now make use of the dot- prefix
- Activate.sh can be used to activate all stow packages
- I used to append tons of paths to my PATH environment variable
    I have now changed to moving build binaries into /opt and symlinking
    the necessary binaries to /usr/bin/local. This makes all tools build
    also available as the root user
- Replaced the dmenu in i3 with rofi and a nice fitting colourscheme

git/dot-gitconfig

@@ -0,0 +1,13 @@
+[user]
+	email = nigelbarink@hotmail.com
+	name = Nigel
+	signingkey = C54278C495538619
+[filter "lfs"]
+	clean = git-lfs clean -- %f
+	smudge = git-lfs smudge -- %f
+	process = git-lfs filter-process
+	required = true
+[init]
+	defaultBranch = main
+[commit]
+	gpgsign = true