WIP: Experimenting with a rewrite to Zig & a new data model

The new data model is supposed to solve a few problems with ncdu 1.x's
'struct dir':
- Reduce memory overhead,
- Fix extremely slow counting of hard links in some scenarios
  (issue #121)
- Add support for counting 'shared' data with other directories
  (issue #36)

Quick memory usage comparison of my root directory with ~3.5 million
files (normal / extended mode):

  ncdu 1.15.1:     379M / 451M
  new (unaligned): 145M / 178M
  new (aligned):   155M / 200M

There's still a /lot/ of to-do's left before this is usable, however,
and there's a bunch of issues I haven't really decided on yet, such as
which TUI library to use.

Backporting this data model to the C version of ncdu is also possible,
but somewhat painful. Let's first see how far I get with Zig.

1 files changed, 1 insertions, 18 deletions

diff --git a/.gitignore b/.gitignore
index 4533894..53dc7b4 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,21 +1,4 @@
-Makefile
-Makefile.in
-aclocal.m4
-autom4te.cache/
-compile
-config.h
-config.h.in
-config.log
-config.status
-configure
-depcomp
-install-sh
-missing
-.deps/
-.dirstamp
-*.o
-stamp-h1
-ncdu
+zig-cache/
 ncdu.1
 *~
 *.swp