Introduce support for TOML config-format

This commit introduces support for the semi-popular TOML
config-format[1] through a new major-mode: toml-ts-mode.

I've read through the full spec[2], and from what I can see this
major-mode should provide correct syntax-highligting for every sort of
config-declaration which adheres to the specification.

Besides that it also adds support for imenu and basic tree-sitter
based navigation.

[1] https://toml.io/en/
[2] https://toml.io/en/v1.0.0

admin/notes/tree-sitter/build-module/batch.sh

@@ -1,6 +1,7 @@
 #!/bin/bash
 
 languages=(
+    'bash'
     'c'
     'cmake'
     'cpp'
@@ -13,8 +14,9 @@ languages=(
     'json'
     'python'
     'rust'
-    'typescript'
+    'toml'
     'tsx'
+    'typescript'
 )
 
 for language in "${languages[@]}"