Added an initial README file

README.md

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+# taggo
+
+local file tagging utility tool
+
+## Install
+
+WIP
+
+## Usage
+
+```bash
+# initializes database in the current folder
+$ taggo init
+
+# lists all the registered tags and how many files are tagged with it
+$ taggo tags
+
+# registers all the given tags (separated by space)
+$ taggo tags add <tags>
+
+# deletes all the tags given (separated by space) and unlinks all the files tags with them
+$ taggo tags remove <tags>
+
+# renames the old tag with the new one, 
+# this can be a list of tags given that they match the order (old new)
+# example: $ taggo tags rename test test2 old new past future
+$ taggo tags rename [<old> <new>]
+
+# tags a single given file with a list of tags (separated by space)
+$ taggo tag <file> <tags>
+
+# tags all the given files (separated by space) with all the given tags (separated by space)
+$ taggo tag -f <files> -t <tags>
+
+# removes the tags for a single file
+$ taggo untag <file> <tags>
+
+# lists all the tagged files
+$ taggo files
+
+# lists both tagged and untagged files
+$ taggo files --all
+
+# lists all the files tagged with the given tag
+$ taggo files <tag>
+```