[*] change all std::unordered_map and std::unordered_set into ankerl::unordered_dense::map/set variants (#3442)

mainly doing this to reduce memory footprint; we all know how nice ankerl::unordered_dense is

in theory 4x faster - in practice these maps arent that "hot" anyways so not likely to have much perf gained

i just want to reduce mem fragmentation to ease my porting process, plus it helps other platforms as well (ahem weak Mediatek devices) :)

Signed-off-by: lizzie <lizzie@eden-emu.dev>

Co-authored-by: Caio Oliveira <caiooliveirafarias0@gmail.com>
Reviewed-on: https://git.eden-emu.dev/eden-emu/eden/pulls/3442
Reviewed-by: DraVee <dravee@eden-emu.dev>
Reviewed-by: CamilleLaVey <camillelavey99@gmail.com>
Co-authored-by: lizzie <lizzie@eden-emu.dev>
Co-committed-by: lizzie <lizzie@eden-emu.dev>

.patch/unordered-dense/0001-avoid-memset-when-clearing-an-empty-table.patch

@@ -0,0 +1,26 @@
+From b3622608433c183ba868a1dc8dd9cf285eb3b916 Mon Sep 17 00:00:00 2001
+From: Dario Petrillo <dario.pk1@gmail.com>
+Date: Thu, 27 Nov 2025 23:12:38 +0100
+Subject: [PATCH] avoid extra memset when clearing an empty table
+
+---
+ include/ankerl/unordered_dense.h | 6 ++++--
+ 1 file changed, 4 insertions(+), 2 deletions(-)
+
+diff --git a/include/ankerl/unordered_dense.h b/include/ankerl/unordered_dense.h
+index 0835342..4938212 100644
+--- a/include/ankerl/unordered_dense.h
++++ b/include/ankerl/unordered_dense.h
+@@ -1490,8 +1490,10 @@ class table : public std::conditional_t<is_map_v<T>, base_table_type_map<T>, bas
+     // modifiers //////////////////////////////////////////////////////////////
+ 
+     void clear() {
+-        m_values.clear();
+-        clear_buckets();
++        if (!empty()) {
++            m_values.clear();
++            clear_buckets();
++        }
+     }
+ 
+     auto insert(value_type const& value) -> std::pair<iterator, bool> {