Some quality of life improvements

• Add current socket/snapshot name to title - this helps when you have multiple ghc-debug-brick sessions open
• Allow setting the search limit in the UI
• Show the current number of results as well as the search limit in the footer
• Add a command to find ARR_WORDS closures over a given size
• Only print the first 100 bytes of ARR_WORDS closures
• Allow dumping ARR_WORDS closures to a file so that ARR_WORDS over 100 bytes can be inspected