tracer: Handle bad address input in the memory view

tracer: Fix the handler query logic for Java targets

Fixes #164.

tracer: Symbolicate addresses in the disassembly view

tracer: Add static analysis UI features powered by r2

- Support capturing backtraces, enabled on a per handler basis.
- Show event's caller (or backtrace, if available), and support
  disassembling each location.
- Support adding an instruction-level probe by clicking on an address in
  the disassembly view.
- Support jumping to the handler code by clicking on an address in the
  disassembly view.
- Improve styling.

tracer: Fix the generated Java stub handlers (#163)

tracer: Remove unused dependencies

tracer: Handle query string when serving static assets

tracer: Add “Latest Event” button

To scroll the event view to the latest event emitted by the current
handler, and highlight it.

tracer: Add a basic web UI

Co-authored-by: Håvard Sørbø <havard@hsorbo.no>

subprojects: Bump outdated