Inline the submodule of themes/hermit with a git-subtree

Add 'themes/hermit/' from commit '56843f347a642324970ba30d58f23c64e037bb7c'

git-subtree-dir: themes/hermit
git-subtree-mainline: 7844fa5501c271b1b2b5ece2cb19f3202cd6e5ad
git-subtree-split: 56843f347a

themes/hermit/theme.toml

@@ -0,0 +1,18 @@
+name = "Hermit"
+license = "MIT"
+licenselink = "https://github.com/Track3/hermit/blob/master/LICENSE"
+description = "A minimal and fast hugo theme for bloggers."
+homepage = "https://github.com/Track3/hermit"
+tags = ["blog", "minimal", "dark", "responsive"]
+features = [
+  "single column",
+  "featured image",
+  "social icons",
+  "google analytics",
+  "disqus"
+]
+min_version = 0.43
+
+[author]
+  name = "Track3"
+  homepage = "https://www.xxxlbox.com"