Add README; add cli args; finish program

README.md

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+# fix-subs
+
+Some shows will have their subtitles nested in a `Subs/` folder that is within the season itself. This causes some issues
+with Plex as it will not find the subtitles if they are nested. An example of this nested structure is:
+```
+Show Name/
+  |- Season 01/
+    |- S01E01.mp4
+    |- S01E02.mp4
+    |- S01E03.mp4
+    |- Subs/
+      |- S01E01/
+        |- Subtitle 1.srt
+        |- Subtitle 2.srt
+      |- S01E02/
+        |- Subtitle 1.srt
+        |- Subtitle 2.srt
+      |- S01E03/
+        |- Subtitle 1.srt
+        |- Subtitle 2.srt
+  |- Season 02/
+    |- S02E01.mp4
+    |- S02E02.mp4
+    |- S02E03.mp4
+    |- Subs/
+      |- S02E01/
+        |- Subtitle 1.srt
+        |- Subtitle 2.srt
+      |- S02E02/
+        |- Subtitle 1.srt
+        |- Subtitle 2.srt
+      |- S02E03/
+        |- Subtitle 1.srt
+        |- Subtitle 2.srt
+```
+
+This short program will go through the folders and grab the subtitles files (.srt) and place them in the appropriate season folder.
+It will also rename the folder correctly (Season xx format). It will then remove the old `Subs/` folder within the season.
+Plex should then be able to search for these subtitle files and load them correctly.
+
+## Building / Running
+Compiled with golang 1.19.3 amd64 linux:
+
+```
+go build fix-subs.go
+```
+Or run without building
+```
+go run fix-subs.go
+```
+
+## TODO
+- Set goroutines to cycle through directories simultaneously