Feat: Add live reloading of configuration file (#684)

* Add live reloading of configuration file

This also removes the need for a file with all the available
configuration and a shadow configuration file.

Additionally, added several improvements:
1. Reduce I/O on initial configuration loading by only reading file once
2. Remove unnecesary back and forth events when editing configuration

* Add missing return type

* Consistently reset on config changes and error if failed to initialize config

* Fix massive I/O load on startup by numerical options

* Use _findVal when monitoring config file

* Apply PR requested changes

Signed-off-by: davfsa <davfsa@gmail.com>

* Add missing =>

Signed-off-by: davfsa <davfsa@gmail.com>

* Fix reassignment to const, change to let.

---------

Signed-off-by: davfsa <davfsa@gmail.com>
Co-authored-by: Jas Singh <jaskiratpal.singh@outlook.com>

src/options.ts

@@ -90,7 +90,7 @@ const tertiary_colors = {
     surface2: '#585b71',
 };
 
-const options = mkOptions(CONFIG, {
+const options = mkOptions({
     theme: {
         tooltip: {
             scaling: opt(100),