perf: new file-based cache that ensures correct rtp order (#532)

* perf: new file-based cache that ensures rtp is alweays correct and will cache all files, including those after startup

* refactor: new cache

* test: fix tests

* fix(cache): cache file names on Windows

* feat(cache): allow to disable the cache

* docs: updated cache settings

README.md

@@ -347,7 +347,7 @@ return {
       init = " ",
       import = " ",
       keys = " ",
-      lazy = "鈴 ",
+      lazy = "󰒲 ",
       loaded = "●",
       not_loaded = "○",
       plugin = " ",
@@ -409,14 +409,6 @@ return {
   performance = {
     cache = {
       enabled = true,
-      path = vim.fn.stdpath("cache") .. "/lazy/cache",
-      -- Once one of the following events triggers, caching will be disabled.
-      -- To cache all modules, set this to `{}`, but that is not recommended.
-      -- The default is to disable on:
-      --  * VimEnter: not useful to cache anything else beyond startup
-      --  * BufReadPre: this will be triggered early when opening a file from the command line directly
-      disable_events = { "UIEnter", "BufReadPre" },
-      ttl = 3600 * 24 * 5, -- keep unused modules for up to 5 days
     },
     reset_packpath = true, -- reset the package path to improve startup time
     rtp = {