add File search endpoint

[QuintenQVD0]

Changes

This PR ads an endpoint that allows you to search through files./
Closed #43

How it works

You give it a directory and a pattern to search, and it will return with a list of files (recursively) that matched that pattern.

Valid patterns:

• txt
• .txt
• *.txt
• start (if file for example is StartServer.bat)
• server.jar (full filename)

a pattern must be at least 3 char long

all patterns are treaded case-insensitive

What it will return:

where name is the relative path + the filename

Config options

• BlacklistedDirs: currently does work because of some panic error but for now hard-coded to:
  var blacklist = []string{"node_modules", ".wine", "appcache", "depotcache", "vendor"}
  Are the current blacklisted dir where we will not go in recursive
• MaxRecursionDepth: this works and is the max of how deep the recursion will go (default: 8)

Performance

on a local node with a wine conan-exiles server that has almost 6 GiB of files, it takes 24ms for the request to respond (1026 files found on *** pattern)