Add "test" target for some linting; reorder man page sections

Makefile

@@ -13,7 +13,7 @@ ZIG_FLAGS ?= --release
 
 NCDU_VERSION=$(shell grep 'program_version = "' src/main.zig | sed -e 's/^.*"\(.\+\)".*$$/\1/')
 
-.PHONY: build
+.PHONY: build test
 build: release
 
 release:
@@ -93,3 +93,8 @@ static:\
 	static-linux-x86 \
 	static-linux-aarch64 \
 	static-linux-arm
+
+test:
+	zig build test
+	mandoc -T lint ncdu.1
+	reuse lint

ncdu.1

@@ -473,6 +473,16 @@ the local system without any network latency, and
 .Nm
 does not keep the entire directory structure in memory when exporting, so this
 won't consume much memory on the remote system.
+.Sh SEE ALSO
+.Xr du 1 ,
+.Xr tree 1 .
+.Pp
+.Nm
+has a website:
+.Lk https://dev.yorhel.nl/ncdu
+.Sh AUTHORS
+Written by
+.An Yorhel Aq Mt projects@yorhel.nl
 .Sh BUGS
 Directory hard links and firmlinks (MacOS) are not supported.
 They are not detected as being hard links, and will thus get scanned and
@@ -500,13 +510,3 @@ directory.
 Please report any other bugs you may find at the bug tracker, which can be
 found on the web site at
 .Lk https://dev.yorhel.nl/ncdu
-.Sh SEE ALSO
-.Xr du 1 ,
-.Xr tree 1 .
-.Pp
-.Nm
-has a website:
-.Lk https://dev.yorhel.nl/ncdu
-.Sh AUTHORS
-Written by
-.An Yorhel Aq Mt projects@yorhel.nl