Add support for all Burp tools (e.g. Sequencer)

[aph3rson]

Other tools exist outside of the types specified by BurpExtractor, such as Sequencer. It would be nice if this extension supported those.

Some options might include one-or-more of the following:

• Repurpose the "All" option in the extension to instead use the TOOL_SUITE callback, which Burp interprets as "all tools within Burp Suite."
• Enumerate all fields within IBurpExtenderCallbacks (e.g. Class.getDeclaredFields()), and build the selector off of that tool. This would allow for individualized selection of all current/future tools in Burp Suite.
  (Some special handling might be needed for the aforementioned TOOL_SUITE value.)